It doesn't sound too abnormal to me, at least not enough to worry about. Definitely keep track of your cycles, though, so you can take the info to your doctor and keep an eye on things, just in case.

Also, check out this website and book. It's geared towards achieving pregnancy, but the information is absolutely invaluable for ANY woman as far as paying attention to menstrual cycles. It is so essential to your health as a woman! I personally think it should be a text book in high school health class.

"Taking Charge of Your Fertility" by Toni Weschler

www.tcoyf.com