20 year old female with vaginal problems. burned when urinating, now my clitoris itches and burns when scratched, now i can't hold my urine, odorous. ?

Yeast? UTI? STD?: This sounds like a yeast infection. However, the "can't hold urine" symptom could be from a bacterial urinary tract infection. Depending on sexual risks, an STD like chlamydia or gonorrhea is possible. Whatever the cause, it should be easy to diagnose and treat. See a doctor. It's probably nothing dangerous, but you still should be examined in the next couple of days. Good luck!