Any help/answers would be appreciated.

I washed the inside of my vagina with water for probably 6-8 months everytime I bathe. Now I barely have discharge (didn't even have any during those months) I stopped washing the jnside in August (this year; probably started around Feb this year aswell) but of course, there's not a fishy but foul smell. I don't know what to do because at that time I also didn't let my vagina breathe doing to me sharing a bed with my sibling. I've started that now ( I'll only get a little discharge) and the smells still here . I also admit that I need to work on a healthy diet, eating fruits/vegetables and drinking a lot more water.

Update: I'm 15, and don't have my gyno. How would my doctor help detect an infection? Also is there a way to get rid of it at home if it's Bacterial Vaginisos ?