Why do I smell? How can I fix it?

Me and my boyfriend started having sex in September of this past year, and (although it was stupid) he would often finish inside of me. I also used to masturbate with makeup brushes, hair brushes, skin care tools. Me and my boyfriend recently noticed that I smell and taste very potent, and not in the good way.. I also don’t have that great of a diet. I have also had a yeast infection twice, and treated it by just changing my lifestyle until it was gone. I’m willing to try anything to help me fix the smell and taste.

UPDATE: I went to the doctor this past Monday and I was so sure that it was bv, but turns out it was just a yeast infection. I just took the prescription last night, and I have another appointment this coming Monday. Thank you all for your suggestions!