I need advice

I had and still have bacterial vaginosis and the er has treated it 2 times now bc my ob wont see me. My ob swears up and down I have a std chlamedia to be exact they have tested me 8 to 9 times already for that and always come back negative I'm still bleeding on and off but my ob just doesn't care they send me to the er everytime I have an appointment bc they say theres nothing they can do but the er said everything looks ok idk what to do at this point I'm 21 weeks on Tuesday