Loosing my mind. / any advice please

3 and half months ago my 2 year old started daycare for the first time! We thought this was going to be a huge relief on us, at home he is very very wild. He doesn’t sleep, he gets into EVERYTHING he’s always doing something. He screams and at one point the tantrums involved kicking hitting etc. we tried everything and it wasn’t helping. Me and my partner were starting to argue due to lack of sleep and pure exhaustion. Things weren’t going well. The hospital we both work at had a daycare they opened just last year, and only employees can take their kids. We thought this was perfect for him to socialize get some kind of structure and it’s ended up being a nightmare and I’m barely hanging on. He first got RSV, right away when he started. He ended up being hospitalized it was so bad and scary. Then he ended up slightly getting better and doctor said he could go back to daycare. He started acting normal for about a week then he gets slammed with a really bad sinus infection this lasted a whole month, he had to be on strong antibiotics, then a week after that he caught the FLU type A. This didn’t last long but ever since it’s been nothing but violent coughing ( keep in mind ever since he had RSV he’s been coughing ever since ) he coughs all night every single night for now 3 and half months and it’s turning into just this last week he throws up about two times everynight from coughing so hard, during the last 3 months he’s had 5 double ear infections ( dr is now talking about tubes if he gets another!) the constant runny nose and mucus 24.7 for now 3 and half months and on top of it the dr says he now has a stomach bug. He has diarrhea just pure water diarrhea probably 3 times a day. I legit don’t know what to do anymore. The dr said a few days ago she thinks all of this is a reaction from the constant illnesses he’s had and possibly it’s asthma on top of it? I have no idea anymore! Nothing makes sense anymore! No sleep for months, constant throw up messes and washing bedding everyday. He won’t eat much anymore. He hardly has ever been sick until he started daycare. The dr said not to pull him out of daycare so he can keep building his immune system but I’m at a complete loss. I don’t know what’s going on. Any advice really appriciated from a mama whose loosing her mind.

And on top of this my 6 year old broke his wrist at school a month ago and has had to have surgery and his ortho dr appt every two weeks and I don’t even feel alive anymore. I’ve had to stop working because I csnt physically take on working. I can barely keep up with housework and now me and my partner are going at it again because he’s working 3-4 shifts every week ( he’s a travel RN now ) and I’m taking on everything mainly. So due to both being exuasted we just aren’t getting along.