AITA for being angry at my bf

I F(27) one day out of nowhere, started having an intense abdominal pain. At first I thought it might be constipation, since I have bowel problems but as the hours pass by the pain just gets worse and worse.. I told my bf (27) and naturally he started worrying but I can't understand what was going on in his mind that day. I just wanted to lay on the bed and do nothing but try to relax and hopefully feel better. He would annoy me, tease me and tickle me even though I told him to stop so many times. I reminded him again and he slapped my tummy!!! I was shook and in excruciating pain. I was about to cry, called him an a*hole and kicked him out of the room. He got upset and told me I was overreacting. I ignored him and gave him the silence treatment. He did apologize but I was so angry and he got the pain. He then let me be and didn't bother me again. Afterwards the pain just kept getting worse, I couldn't sleep all night and then in the morning I had to go to the ER. They had to run tests and stayed there for some time and needless to say, I had to get operated immediately for a ruptured appendix. After surgery, he was there for me and apologized again and even though I forgave him, I can't shake off this weird feeling that I have.