Was it regular right away? Did your cycle change once you had weaned completely?
My cycles since DD was born have been a bit off. We are mostly weaned, (down to 2 nursing sessions per day and no pumping). Now that we are TTC #2, I wonder if I need to wean DD completely for my body to be "back" and ready to conceive again. Did you notice any differences in your cycle between when you were BFing and after you weaned?