Worried this could be something else

Hi ladies. I'm very nervous about writing this, but I'm tired of being afraid so I'm reaching out for this clarification. My boyfriend and I have been together for almost 2 years. After we had been together for a few months, we split up for a few months. During that time I dated someone else. I get yeast infections constantly it seems. Every time I have sex, it seems like I get one a few days after. I could be overreacting but it feels like I always have one. Part of me wants to get it checked out to see if there is something going on. But I'm too scared to in case I have something else going on. My boyfriend knows I get lots of yeast infections. But if I were to find out I did have something, I'm scared at the thought of talking to him about it. I am completely faithful to him, I don't even have guy friends or hang out with anyone besides my cousin who is female. I have not cheated on him ever. Part of me wants to get it checked out. But the other part of me is fearful that if I had something, he would automatically assume I cheated and caught something. Any suggestions?