did you check your blood sugar

high blood sugar level is one possible reason of yeast infection.

also keep yourself warm in the winter, especially lower body and around waist, that will help. Use hair dryer in low hear to dry your lower body after you shower will help also.

finally, if none of this help, make an appointment with a good OB/GYN (usually the male OBs are good) or try some Chinese medicine.

hug hug and best wish!