so i’ve never had this happen until my current sex partner. but after sex i notice this quarter sized bubble inside of my vagina. it doesn’t hurt but it’s very inflamed and sometimes i’ll get like a lighting throbbing pain in my vagina and pelvis. he’s a little big too idk if that hasn’t anything to do with it. it doesn’t happen every time. but i’ve noticed it twice now. i read it could be linked to an STI. should i be worried? after a few days it shrinks and goes away but occasionally i’ll still get a throbbing pain down there. should i confront him about it ?