Embarrassed!

I swear, I get BV every month! I ALWAYS pee after sex, rinse with water, but sometimes it STILL happens. I hate it! It smells do bad and I don't even want my boyfriend to touch me. It seems like I only get it when I'm supposed to be ovulating. Does this happen to anyone else???! Is there a better way to prevent this? We're TTC!!!!! Will this affect my fertility? And I don't want to just hop in the shower right after we've had sex! I feel like that would just kill the mood