BV I'm sure of it

Have a fishy smell, clear/opaque thin discharge and urge to urinate. Uti and BV tests came back negative, but I'm pretty sure it is BV I mean the fishy smell is a dead giveaway. 
I started on probiotics and inserted some hydrogen peroxide gently with a medicine dropper which burns at first then goes away. 
At 30 weeks my Dr. does not seem inclined to prescribe antibiotics based on my symptoms. Should I just continue with probiotics/Hydrogen peroxide regime or try to get antibiotics somewhere else? I don't want BV affecting my baby or early labor.