Sharp pain after sex

Okay so my boyfriend and I finally had sex last night and it was good it was romantic

Umm idk how to put this together lol

So his penis isn’t “big “ i would say 5 inches yesterday was the first time I saw it

I still had pleasure it was good 🤷🏽‍♀️ after sex we hung out when I tried sitting down I had a really bad sharp pain around my Fallopian tubes or like really really bad cramps but sharp like a knife the sex wasn’t “rough” so that couldn’t have been it I brushed it off and tried to lay down instead when I laid flat on my back it felt worse I literally couldn’t take the pain so I laid on my side till I fell asleep .. till today I can’t sit down it hurts still idk what could’ve caused it I will go and make an appointment with my doctor but I’m scared rn he did use a condom I’m not allergic to latex or anything like that anybody had similar problems ?