I think i have mild yeast infection ( a little itching and burning). i took monistat 1 (tioconazole) last night and now it burns a lot more in my vagina. :( why?

Maybe not yeast...: Perhaps you don't have a yeast infection, which would explain why Monistat 1 (tioconazole) didn't "work" and why you feel worse. If that's the case, go see your doc for evaluation, testing & appropriate treatment.

Use Monistat 7 for all 7 days and if that doesn't work please bring this up with your Gynecologist who knows your medical history. If you don't have confidence in your Doctor see another for a second opinion.