help for a 25 year old w/discharge and pain

I'm 25, virgin and since January been having discharge and have been to 5 different doctors who tell me I am fine. Its sometimes itchy, yellow or green. I feel gross and no one can tell me whats wrong. Now I experience pain in and around my cervix before period. I had a pap in January, said im normal. They first diagnosed me with Bacterial infection, now they say I never had it, just symptoms. I can't deal anymore and I don't know what else to do...