hey, for about a week now i have had burning, itching and sorness in and around my vagina! i have also noticed that the lips of my vagina has swollen a little bit. i am also needing to urinate at least every 10 mintues and it burns when i do... yesterday i also noticed that i had a yellow discharge, i am in agreat deal of pain and would like to know if you could help me!!!! i have only had sex once and am not sure if this is an sti!