What to know about Bacterial Vaginosis

Hello, I already have an OBGYN but am embarrassed to ask questions, knowing that I have a lot. I have endo and that is the reason why I went to an obgyne but not for this. I know some already experienced having a BV here and I just really wanted to ask some questions bc I don’t want to google it and for me, someone who have already experienced it is much more credible.

My questions are where do we get BV? Is it purely bc a man had a sexual intercourse with another woman? Or it is possible that they can just throw off your ph balance? And if a man carries the bacteria, how long does it stay? Also, does BV go away on its own?

I’ve seen ppl say that if your partner is giving u bv, it means he is cheating.

In my case, it was my first time ever to engage in an intercourse and I immediately felt itchy down there. At that time I am afraid of going to the doctor so I let it be and after a while it was gone. However, sometimes I still get itchy there — let’s say after my menstruation or before. Sometimes not even. And I am still with the same partner.

There’s come to a point that I am even thinking that maybe he is cheating whenever it re occurs. Tho there was a time where we abstained from having sex for a month or so and I still felt a little bit of itchiness.

I’m also puzzled bc when the obgyne checked me recently, she does not see any yeast infection but I still feel itchy sometimes.

Sorry for the long post.