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Jon Gosselin has revealed that he was hospitalized for COVID-19 and close to being put on a ventilator as he continues to battle the virus, but his estranged children don't even know he is sick. 

The former Jon & Kate Plus 8 star opened up about his diagnosis and hospital stay during an interview on The Dr. Oz Show, which was recorded today and will air on Thursday.  

The 43-year-old, who has been working as an IT director at a healthcare facility during the pandemic, told host Dr. Mehmet Oz that he had a 104.8-degree fever when his girlfriend Colleen Conrad's daughter Jordan took him to the hospital.  

© Provided by Daily MailScary: Jon Gosselin, 43, has revealed on The Dr. Oz Show that he was hospitalized for COVID-19 and almost put on a ventilator

Dr. Oz noted people can start seizing if their temperature hits 105-degrees.    

'I was in a wheelchair. I had to wait in the ER,' Jon recalled. 'It was packed like the hospital was full and then they put me on a gurney and put me in the hallway in the waiting room, so I could get a temporary room.'

He explained everything 'happened really fast' and most of his hospital stay was a blur to him. 

'Once they evaluated me and once they drew my blood and did all my blood work, all of a sudden I'm getting antibiotics, steroids, and a plasma antibody transfusion for COVID,' he said.  

'Then they moved me up to another room, a more permanent room, and then I just remember sleeping and then it was just surreal. Like what? I didn't even realize why I was there until like three days later.'    

Looking back: Jon, who shared photos of himself in the hospital with the show, opened up about his diagnosis and brush with death during a remove interview that will air on Thursday

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Jon's doctor believed that just one more day of delayed treatment could have led to him being on a ventilator, which Dr. Oz noted dramatically raises the mortality rate of the virus.  

'I had a really bad COVID pneumonia based upon my numbers,' the dad agreed. 'Now, what's interesting is I didn't feel it. I didn't feel sick and I didn't feel pain because it didn't feel like someone was stabbing me but when you went to move or do anything and you felt so weak and you wanted to pass out, it was really scary.' 

Jon said he would dread having to stand up and use the bathroom, recalling how he had to ask his nurses to help him with almost everything.  

'I would fear it because I'm like, "Oh my God, I'm going to pass out. I can't breathe,"' he said. 'I called the nurse and I felt guilty calling the nurse all the time. Why can't you just help me get this? Can you help me do that? Everything, you feel like an invalid. 

'You go from perfectly healthy one week to you can't do anything the next week,' he added. 'It was so weird.'

© Provided by Daily MailDrama: Jon and his ex-wife Kate Gosselin, 45, share twins Cara and Mady, 20, and sextuplets Aaden, Collin, Joel, Alexis, Hannah, and Leah, 16, but only Collin and Hannah live with him

© Provided by Daily Mail'I miss them': Jon, who is estranged from his other six kids, told Dr. Oz that his brush with death has made him rethink his relationship with them

Jon and his ex-wife Kate Gosselin, 45, share twins Cara and Mady, 20, and sextuplets Aaden, Collin, Joel, Alexis, Hannah, and Leah, 16. 

However, only Collin and Hannah live with their father. Their siblings are being raised by their mother during their parents' messy custody battle, in which both Jon and Kate have accused the other of abuse. 

Jon's other children are unaware that he has COVID-19 and will likely find out the news from his interview on the show. 

The dad told Dr. Oz that his brush with death has made him rethink his relationship with his estranged kids, and he shared an emotional message for them, saying he 'loves them.' 

'I hope they develop a relationship with Hannah and Collin. I hope that one day I can be part of your life,' he told the camera. 'I'm glad that I got a second chance. I was more concerned about myself in the hospital and getting better and getting back to my family. 

'I miss them,' he continued. 'That's another surreal part of my life that I have developed a thick skin around to move forward to just help Hannah and Collin right now since they live with me. Those are things that I want to build towards.' 

© Provided by Daily MailTorn apart: Jon's other six children live with his ex Kate, pictured with Cara and Mady

© Provided by Daily MailFame: The former couple first welcomed their twins in 2001 and the sextuplets followed in 2004, which led to their reality show a few years later

Jon's hospital stay comes months after his son Collin alleged that his father had punched and kicked him in a now-deleted Instagram post, prompting an investigation.

The Couples Therapy alum denied the allegations, and in September, he showed DailyMail.com a letter from the Berks County Children & Youth Services in Pennsylvania confirming the report of suspected child abuse was 'unfounded.'   

Two months later, Jon encouraged his children to speak out about the drama surrounding their family during an appearance on The Dr. Oz Show.  

'I think the kids need to talk,' he said. 'I mean, I'm giving them the outlet of, "If you want to talk to the public because you're public [people], you have every opportunity to do these things."'  

Jon added that he felt 'an intervention' from his children would be required for him to ever mend bridges with his ex-wife.

'I have no idea if they'll reach out in that way. I've left that in their court and I'm just focused on the two that are living with me because there's so much going on with therapies and work and COVID and everything else,' he said.