Hello, Thanks for sharing your health concern with us. Since you do not have regular menstrual cycles, it is difficult to predict your ovulation period. Also, the condom has a higher failure rate when compared to the hormone contraception. In the current scenario, please go for the pregnancy test, either the HPT or the blood test to confirm/exclude pregnancy. If negative, you can get medication to induce a period after consulting a specialist. A trans-vaginal/pelvic sonogram is helpful to plan further management. Hope this helps.