Bacterial vaginosis

Is anyone else prone to b.v. every time my s.o.s cums in me too often I get one. Its so annoying. And plus I'm trying to conceive and the only thing I get when he cums in me more than 4x is b.v. 😩😩😩 we're both std and disease free. That's just seems to be my biggest prob besides getting pregnant. TTC for 3yrs. Did blood work and it shows that I ovulate.