Yeast 😩😤

My boyfriend and I been having unprotected sex. I never had so many yeast infections in my life. Most of the times, I never get the symptoms but I find out from him. As he been, complaining about burns and itchiness. One day, during love making, he asked me when the last time I got checked😑. I felt so angry, as I am one of the few people who actually take care of my body. I mean like literally go to the doctors for EVERYTHING! Lol. When I went to my GYN, she never can tell me why I keep getting yeast infections. Other than I’m always on antibiotics.. btw I’m always sick 😩. But now it’s upsetting him. He feels like I’m doing this on purpose (Not telling him). I’ve taking monstat and diflucan (probably spelled it wrong). He’s been using a topical cream. It seems like we are passing it back and forth. I’ve been having yi frequently since 2 months after starting my new birth control pill (nexplanon). I wonder would that be the cause 🤔. I just feel so alone with this.😫