Test was negative

I had chlamydia about a year ago and got treated. I just went back to the doctor to get tested again because my symptoms never went away and I thought maybe I still had it. Well the test came back negative. They said to be able to check for BV or vaginitis, etc I would need to do a separate test.. the screening already cost me $145 and I don’t have insurance. I really don’t wanna pay for another test If I don’t have to. Is there anything I can purchase from the store to take?