I'm a newbie---could someone please help me. me and DH are ttc and want to pin point ovualation. my periods are irregular, it ranges from 21 to 28 days from the last AF...since it never goes over 28 days does this mean that I have a 28day cycle? my last AF was from may 14-17(which is a normal for me)..thanks in advance for your comments..

It sounds like you're ovulating at different times each month, you aren't going to have much luck charting the actual ovulation. Have you tried Ovulation Predictor Kits? Good luck and welcome to the board.