Hello, Since you have irregular menstruation, it is difficult to predict your ovulation pattern. Either a recording of basal body temperature from day one of the cycle to show rise of temperature at the time of ovulation and/or follicular studies help to detect ovulation. So, in the current scenario, you may opt for the detection of the serum beta-hCG titres followed by a trans-vaginal sonogram to confirm/exclude pregnancy. If negative, hormone supplements may be given to attain a proper withdrawal. Ovulation should be studied and further management planned. Hope this helps.