S.K.
I breastfed my daughter and started the weaning process at 13 months and finished completely around 15 months. It took about three months after finishing completely for my period to return. I agree that it would be a good idea to take a pregnancy test, just to be sure. Also I found the ovulation strips (CVS brand) to be very helpful to see if I was ovulating (though I didn't think to start those right away - I started a couple months after weaning completly). I wouldn't be worried if I were you, everyone is different and you never know what the body is going to do. good luck!