I am trying to determine if i have an irregular menstrual cycle. My last 12 cycles have been 32, 28, 30, 30, 28, 32, 30, 32, 33, 32, the year before was 29 38, 28, 34, 31, 28, 30, 27, 21, 32, 28, 30. I have been trying to conceive for 4 years with one m/c ending before my next period was even due.