I second temping and charting. It will help you see some patterns that are hard to see otherwise. Based on the dates you give, your cycles aren't terribly off. It looks like you average around 26-27 day cycles. Those aren't too short for pregnancy. If you don't want to temp, you could do ovulation predictor kits for as many days as it takes in a month. Based on your cycles, I would start testing no later than CD 10 just to be sure. I also second getting a hormonal workup from your doctor. BTW, have you read Taking Charge of Your Fertility? I think it would be very helpful to you in understanding your cycles a little better. Almost every woman I know has read it. Good luck!
Most of us on here are big fans of temping.
~~Torri
~~Xander 10/20/05
~~Torri, Xander 10/20/05, and Sebastian 10/07/09