Is this normal?

I always get what i think is BV after my periods. It lasts about a week and a half. I try to drink a lot of water, take vitamins and probiotics to help. But it takes that week to clear up. Is this normal? It sucks because i dont like to have period sex (i feel dirty) so i go a week without that, then another week and a half because of this smell. My boyfriend says he Doesn’t smell it but i do. Maybe he’s just trying to be nice, idk. He cant tell, but i can. I cant smell it through my clothes, but its definitely a fishy acidic smell! And it always goes away after the 9ish day, but ya, it always comes right after my period. Please help!