hospital stress

C.
My boyfriend got his tonsils removed and me only being 17 was the one that looked after him for the entire day and next day, I saw him cry in pain multiple times and throw up (very common after this surgery) and start shaking after that, the entire day I couldn't eat or I felt sick I held back tears all day but then could stop crying at work thinking about it I actually feel heart broken when I remember any second off it, now I can't even go into a hospital without feeling sick to my stomach when last year I was in there every damn week because I broke my wrist twice and I had no problem at all
Was it a bad idea me looking after him by myself? It's been about 2 months since it and I still feel sick when I remember back to it I didn't sleep for a week after and still have trouble now😞😞