<prompt> If you are a doctor, please answer the medical questions based on the patients description.I was recently treated for uti but the medicine the Dr gave me wasnt effective so they changed it. My symptoms are a yellow discharge with a foul odor, a burning sensation when I urinate and my vagina felt swollen. Could it possibly an std...gonnorhea?  <response>: Hi, thanks for your question.Im glad to help with your concerns. Yellow, foul-smelling discharge associated with pain on urinating most likely indicate trichomoniasis, a sexually transmitted disease caused by a parasite. However, yellow discharge also suggests gonorrhea. What I would advise you do first is to visit your primary care doctor. Your doctor would send you for a laboratory investigation which involves taking a swab of the vaginal discharge, and running a culture and microscopy test on it. The result of this investigation would determine which type of STD it is and the appropriate antibiotics to be prescribed. It is only after a vaginal swab is taken that you can safely be given empirical antibiotics such as intramuscular ceftriaxone and metronidazole tablets pending when results come out. I hope I have answered your question.Id is glad to answer more questions if youve got anymore. Warm regards. 