I have had thrush 2 times in the last 6 weeks since going off my birth control pill.

Recurrent yeast. There are several possible explanations, but the one i would suggest trying first would be to have your sexual partner apply an antifungal cream to his penis twice a day while you take an oral antifungal (need rx) for one month or at least thru one menstrual period. If that does not solve the problem you will need a more detailed work-up.