please respond

So I scheduled an appointment with my gyn. But anyway, I have had bv and yeast infection problems for what seemed like the whole year. Doctors give me flaygl and diflucan and hopes it works. It's does until the medication is gone. 
I always get the 2 together so you probably can imagine the itchy, irritated feeling down there 😥. I just finished metronidazole gel for bv Wednesday, my doctor said no sex for 2 days I had sex Sunday and it was like my vagina was on fire. I placed a cool rag thinking maybe it was just because of the rough sex, but now it itches with lots of milky, watery discharge. This discharge has no smell what so ever. 
I took pictures to see what it looked like and my vagina was red and looked swollen, like it was irritated. I looked up symptoms and only got yeast and bv. I was previously tested for all std's so it's not that. Plus to my understanding std's normally would cause an odor. 
I don't know why it keeps coming back, it's like it's taking over my life and ruining my relationships.