reoccurring yeast infection

I’ve been dating my bf going on 5 years we broke up for about 5-6 months. He’s the only person i’ve ever been sexually active w and from what he tells me i’m the only person he’s ever been w sexually as well (btw we started dating at 15, we’re 20 now). Anyways ever since we got back together i’ve been having reoccurring yeast infections. i’ve gotten tested on ever occasion when i go to my doctors so ik for sure it’s not an std or bv. But i literally did a timeline of when we got back together and the reoccurring yeast infections started rt after. i’ve had yeast infections in the past but never this many times. Am i putting to much thought into trying compare the time frames or is this something i should pay more attention to. idk if i’m allergic to his semen because when he accidentally cums in me i get this weird burning feeling sometimes. idk what to do, help!!!!!