I went on the pill several years ago (to help with ovarian cysts, i was only 14) and my period did that. I would have VERY light ones, and then once my body was used to the horomones i began having heavy periods. Eventually they leveled off. I know am on Ortho-Evra patch, and it makes your period go crazy for the first 6 months.

be prepared to buy new jeans,i gained a good amount when i went on the pill.

what pill do you take? I was on Ortho-tri-cyclen, then went to ortho-cyclen.