Husband is sick almost weekly and I can't cope

My husband and I have been married for 2 years. When we were dating he told me he gets sick 2 times a year max. I believed him and I knew it was true then, but not now. If you've checked through my post history, you'll see we've been through a lot this last year. Had a kid, lost our home and are being housed by my parents who cause constant stress. I don't even sleep anymore and have hallucinations from the deprivation. Lately in the last month, my husband has been getting sick to the point of vomiting almost weekly, and we stay up all night just sort of... dealing with it. 3 weeks ago, he got food poisining. I had never seen him throw up before and this was only the start. It seemed to be what set this off. He threw up 15 times in 10 hours. I went to work the next day due to being forced to by the parent police that rule the house. While I was at work I couldn't stop hearing it in my mind and having flashbacks. I told my co-worker that day that I think I was traumatized. Later that evening he said he was nauseous again. That's when it hit me, the racing heart, sweating, seeing black in my vision. This was worse than a panic attack, my body was shutting down due to one word. Nauseous. Now we come to tonight, symptoms started at 10 pm and it's well after 2 am. He's asleep (I think) with a bucket next to him. I can't sleep, I can't move, I can only lay around and pray he makes it to the bathroom. For context on eating habits, he works late and eats directly before going to bed. I do too, I wait for him to be home, eating together is one of my love languages. It works well for me, but I'm not sure if it's good on his stomach, so we're going to try having him eat at work before her comes home at 9. Could it be viruses? Burnout? Stress? I'm struggling with so many of my own symptoms from being taken back to a traumatic home that ruined my childhood and now I had this phobia develop out of nowhere. How can I cope with this while we wait for lab tests to figure this out?