What should I do to get rid of a UTI? Dont have insurance, please HELP!! it hurts?

Ok, Im an international student and Im going to Mexico (home) this Friday, I have a UTI since 3 days... i cant go to the doctor because I dont have insurance here, can I take AZO or Cystex and wait til next Saturday to get the antibiiotics??? Please help what can I do, it smells funny, it hurts when I pee and I saw some blood.