Hi Diflucan is very effective in treating fungal infection. But you should know that infection has no effect on your menstrual cycles. It does not cause irregular cycles. What is your BMI? The irregular cycles you are having suggest that you are not having regular ovulation. I advise that you and your husband/partner should first register for treatment with subfertility specialist. You should not consult pharmacist for this. What investigations you have done so far? You need to do hormone test including thyroid function tests and Fallopian tube patency test. Your husband should do semen analysis. Based on the results of investigations treatment can be given. I hope I have answered to your satisfaction. Take one tablet of folic acid daily. To increases your chances of pregnancy, maintain normal BMI, quit smoking ( if you are a smoker) and have intercourse atleast three times in a week. if you have any further queries feel free to contact me through health care magic