Why do I keep having white vaginal discharge after sex?

[cheystanley]

My boyfriend and I have been having unprotected sex for 7 months now. There have been several occasions between September-December that I've had to take the plan B pill because I didn't have access to birth control or health insurance at the time. My discharge started rapidly producing on my underwear, after sex it would be all over me and my boyfriend and it had a foul scent, also had a metallic sour taste. I thought it had something to do with the excessive amount of plan b pills I had consumed so we started using condoms and no more plan b's. The discharge didn't stop it only got worse. I couldn't take it anymore so I spend $120 to see a gynecologist who told me I probably had bacterial vaginosis and a yeast infection and also told me I needed to get a full panel STD check. I took the medication for the BV(metronidazole) and yeast, and the discharge wasn't going away neither was the metallic, sour taste. I was devastated, and finally able to get health insurance so I went to go see a primary care provider who check inside my vagina and saw that my cervix was inflamed. She thought maybe I had chlamydia so she prescribed me anthramycin metronidazoleand took a full panel blood test for STD's and HIV and also a referral for me to get a pap smear. I took the medication for chlamydia but not the BV because I had already tried out that medication and it didn't work. My boyfriend went to get tested for ghonnoria(sorry if spelled wrong) and chlamydia and took the same medication. The doctors called him a couple days later to tell him he did not have chlamydia or ghon. To my surprise after taking the anthramycin, my discharge was gone. I was no longer experiencing the discharge or the foul taste. My boyfriend and I refrained from having sex for a week to be cautious. When we started having sex again unprotected a week later, this discharge was back! This time it was light. I was furious because this has never happened to me in my life and I'm 20 years old and have been sexually active for 4 years now. I went to the gynecologist for the pap smear and he said I was too young, but when he opened me up he saw that my cervix was a little inflamed so he did the pap smear anyways and also swabbed me for STD's and infections. He told me I would get a call if anything was wrong, but I never got a call. Also the doctor who gave me the full panel blood work never called me, but they were a low class doctors office so I called them and found out that the lab hadn't even brought in my results yet(mind you, it's been 3 weeks). Frustrated and helpless, I tried to forget about it. Now it's been 2 months later and I'm experiencing HEAVY white odorless discharge after unprotected sex with my boyfriend. It's on him and all over me, it's abnormal to say the least. I really need help, I don't know what to do. I'm afraid if I go to a 3rd gynecologist they will just prescribe me metronidazole again which I already have sitting in my medicine cabinet and am contemplating taking again. I've scheduled to get blood work done at labcorp because I don't trust the low class doctors office I visited that never received my lab work. I'm scared, embarrassed and confused. The discharge has not been so much a problem on my underwear anymore but it acts as an excessive lubricant during my unprotected sex with my boyfriend which I don't think is normal because in the past my lubricant has been clear and sticky. Should my boyfriend and I start having sex with condoms? Should I just refrain my sex altogether? Somebody please help me, I'm at my wits-end.