Sick husband how do I help 😖

My husband has been sick since Christmas with congestion horrible cough, the whole shabang. As he started to get better mid February I got a cold and passed it to him getting him extremely sick all over again. He’s gotten the worst of it and it makes me feel so horrible!! He’s taken all the medicine we could think of these past few months to help him. This is how these last 24 hours have been

He came home from work with a headache due to congestion, very tired, coughing. He took an allergy-D which is the most helpful to him right now. It says to not eat with food and not to eat until an hour after.An hour passes after he took it so we had subway. We both ordered the exact same think besides some different veggies (he had olives and cucumbers I didn’t) then we both went to sleep about 45 minutes after eating. He woke up this morning feeling better! Took another allerga-D since the 12 hrs had passed since the last one. Again empty stomach which has never been a problem. He also took a Vitamin D3 pill my mom brought to help boost immune systems. Everything was great i sent him off to work with a yogurt and a banana for breakfast once the hour passed for him to eat. He then calls me saying a few minutes after eating the yogurt, he started vomiting. At first he vomited the yogurt, then he started vomiting his mucus. Then he started vomited bile. He had only been at work for 5 hours at this point and had been throwing up for the past 4 hours so his job sent him home. (Which sucks because I’m not currently working bc I’m giving birth sometime soon so we really depend on him working for money) I can’t tell what got him sick because I feel fine so it couldn’t be the subway if we had the same thing. I’m thinking it might’ve been the D3 vitamin he took since he ate it without food but he had been taking them this past week and it’s the first he’s gotten sick. His coworker gave him a nausea pill and I’m thinking it helped a little since he came home and passed out on the bed but every 5-10 minutes he wakes up gagging. I don’t know how to help him 😖😖 I also have a HUGE fear of vomit so I’m not looking forward to actually hearing him do it or seeing it so far it’s just gagging since he’s been home. I’ve grabbed him some waters, I have my nausea pills here, pepto pills, some Picot(like alka seltzer)ready for if he needs it.

Does anyone have any idea of what it could’ve been? Could the yogurt have been bad since it started RIGHT after he ate it? (We just bought the yogurt 3 days ago) Or something else? Cause it be exhaustion since he hasn’t been sleeping due to the cold he has? I want to help him so bad but we can’t see a doctor since we’re kinda tight on money right now. (We’ve seen several doctors for him these Past 3 months, even gone to ER twice, racking up huge medical bills) I could buy him saltine crackers but other than that we have no clue why he’s been so sick 😢😢😢

Sorry this is so long I’m just so worried about him.

We have seen several doctors.

-The first time was ER. Told him it was just a cold and to take OTC medicine this was on Christmas.

-Second doctor in January told him he had a viral infection and ear infection, which we took medicine for that was prescribed as well as steroids shots they gave him

-Third time in early February we went to the doctor (ER) was excessive coughing causing chest pain. They diagnosed him with bronchitis and pleurisy. Which they gave him breathing treatment, steroids in his IV, inhaler and other medication.

-Fourth time in late February said it was a cold and another ear infection.

We have taken all the medicine he’s been prescribed and taken any all all recommended OTC medicine. Still hasn’t gotten better 😞