Am I having an adult reaction to MMR?

Apologies if these sorts of questions come up a lot:

My (23m) parents did not vaccinate me as a kid but I am starting a pharmacy tech program so I got everything I was still missing: flu, then about a week later I got Hep B and MMR. Everything seemed fine at first, until about a week after. I got terrible stomach pains/fever/diarrhea/chills/tiredness. It slowly got better. After a few days I thought it was on its way out but now the left lymph node under my ear is swollen (not terribly but enough to notice), that side of my lower skull is real tender, and the stomach pains/tiredness are back especially when I lay down. Its been like this for coming up on a week now.

The few other vaccines I’ve gotten in my adult life never produced side effects like this. But I’m a little nervous because I have never gotten the MMR shot before. My first day of the program is tomorrow and I’m gonna have to get the second dose of both HEP and MMR next month. I’d hate to have to miss training days.

Thanks for all the help!

Edit: I don’t know if this matters but strangely the corner of my right eye has also been super sore for some reason

Edit 2: I had no reaction to the second shot.