Hey,
I don't know much about BV, but I would suggest you go see another doctor. Obviously the one you are seeing now isn't respecting you, and you no doubt want to get this figured out sooner rather than later. As far as being worried about getting HIV, your chances are reallllllllllly reduced if you use a condom every time. Infections down south can make it easier for the virus to get into your blood stream, but if you use a condom, it's a hell of a lot harder for the virus to get to your vagina in the first place. Good luck finding a new doctor! :-)