Sorry but that sounds like an STI
BV, Chlamydia, Gonorrea all have those similar symptoms. You should def. let your doc know whats going on. I had BV when I was pregnant. Some antibiotics cleared things up.
I'm not sure I understand the results of the swab. If it's a green discharge, it may mean trichomoniasis, a bacterial STD that requires treatment. You need to get some more thorough testing done to find the source of the problem.