Before Christmas for several weeks (possibly months, i can't remember) i had large amounts of clear, smelly discharge, and my vuvla was constantly in pain and burning. It was very itchy, and when i scratched it, it would become inflamed. I had lower stomach pains as well. However, over time this has gone away, and instead I get smelly white discharge, which comes and goes. And every time anything enters my vagina it is very painful, and my vagina quickly dries out. The smell has also changed, it's not bad just different (unless there is alot of white discharge). Also, my periods have changed, producing brown tissue in a clear liquid. I also constantly pee when laughing, or exercising, and want to know if this is linked? Or this is all because of weak pelvic muscles?
Just before this occured I had had intercourse with my boyfriend (not unusal) however I have found out that my boyfriend my have slept with someone else just before Christmas as well, and was wondering if this could be linked to that? However i also frequently douche and masturbate alot, and wonder if it is bacteria or damage from either of these?
Naturally I am horrendously embarassed, and my confidence has plummeted. I'm only 17 and have been too embarassed to go to a doctor, and would like to know if these are any symptoms of an STI, or something harmful, or if it is natural or to do with bad hygiene?