Four year old discharge problem.

Hi, I'm a seventeen year old with a problem. I have a foul, vaginal discharge that I've dealt with since I was thirteen (4 1/2 years) and I'm tired of it. I have no itching, rashes, or STD's, just this discharge. It ranges from clear to bright yellow, and extremly thin to so thick that I feel it come out. I've tried creams and anti-bacterial sprays thinking it was a yeast infection but the only thing that those did was camoflauge the smell for about two weeks. Then it went right back to doing what it was whether I used products or not. It's extremly annoying. The only other trouble I've ever had was right when I turned 13 -- I had a burning sensation after I peed and abdominal pains. The doctor never found out what was wrong after doing CAT scans, and X-Rays. Just after about a week -- it went away, and then this started and hasn't stopped. I haven't been to a doctor since I was 13, because I hate them, I deal with my problems. But with this -- I've had it. Should I break down and go see a specialist? Or is there /else/ anything I can do?

-Casio