Well i had my son may 18 2010…Had sex once in middle of june…Well, then in the middle of july i had sex with the same person…Well then i started my period, 2 days after ending i had intercourse again same person…But after we finished I had this really foul odor..I mean it was horrible never had this smell before..Well then that next day I had yellow discharge..Now, its been about 2 days I still have yellow discharge n that foul odor smell…But, I dont have any symptoms of itchin, burnin, swellin, pelvic pain….So I didnt know if I had and STD or yeast infection I have a doc appt wend for my birth control but was worryin n wanted sum1 else opinion…I think i have trichomonas after readin the websites but iam not sure…