Morning After Pill Affect?

I had sex on last Sunday and my last day of my period was Monday. well the condom broke Sunday and I ended up Tuesday going to the health department and getting the morning after. well last night i was lightly bleeding you got to think, its been 5 days yesterday since I got the morning after and today I'm bleeding heavily. does it normally cause you to have your period less than 7 days after you just got off your period?