Hi What is your age and BMI? First register with infertility specialist and do basic infertility investigations. Hormone tests and Fallopian tube patency tests for you and semen analysis for your husband. You can be treated based on the results. Since you have irregular cycles it appears that you have anovulatory cycles. you will need help of medications to induce ovulation. To improve your chances of pregnancy maintain normal BMI, quit smoking ( if you are a smoker) and have intercourse atleast three times in a week. I hope I have answered to your satisfaction.