Hi! I too am 26 (TTC #2). I went off the pill over a year ago and seriously concentrating on conceiving for the last 5 months. My periods are the same as yours. It is so frustrating! When I got pregnant with my son (5 years ago), I was on the pill to regulate my cycles. Sometimes, I wonder if it regulated me just enough to be able to ovulate and conceive.
(I didn't take it regularly enough to prevent pregnancy b/c the Dr said I wasn't ovulating and needed assistance to get pregnant someday)
Have you tried monitoring your cervical mucous? This month I am pinpointing the EWCM and really trying around then.