i had unprotected sex almost 2months ago, went and got the mornin pill within 48hours, so thought everything was fine. but my period was about a week late and was realy light, almost a pink colour which lasted a few days. about 2 weeks later i got my period but it was a brownish colour which was on and off for about a week and another 2 weeeks later its started again (today)but its very light again and is causing me no pain, usualy i have severe period pains that painkillers dont help with much. wats going on?