Sex ruined /:

so me and my boyfriend started dating 8 months ago. the first couple months we had sex a lot. i know that's tmi, but we'd be able to do it anywhere and any time and we both had fun. i got a yeast infection or something wrong with me a couple months ago, and now every time we even try to do it, it's extremely painful or it won't even go in at all sometimes. we barely ever do it anymore and i'm scared that it's not fun for him anymore since i'm hurting. i don't really know what's wrong or how to fix it and i don't know if anyone can help either 😞