Help!

before i went on the pill i would have bad cramps and long irregular periods. when i took the pill my periods would be on time and last around 4 days. i stopped taking the pill because my periods started to get very light and not last long at all. also my husband and i want a baby. but i havent gotten pregnant yet and my periods did not go back to normal. this cycle only lasted 2 days and was very very light. i had a misscarriage last year too. what should i do?