Re: burning bladder & vagina

I am 17 years old and have been having sex with my boyfriend for probably 6 months now. We are each other's firsts.....first everything! After i started birth control, about 6 weeks ago, i have had incredible burning during/after sex...and when i urinate shortly after sex. I switched birth control, i was tested for multiple infections, they all came up negative, i was not put on any medication, becasue they came back negative. I still have horrible burning. It makes me want to cry! Is this what i have to look forward to the rest of my life?? I'm not sure where to turn.