I had sex July 1st and the condom came off. That night about 1 hour later I took plan b and everything was fine. On the day I normally would've ovulated (July 6th) I had a brownish discharge and then a had heavy spotting just for the day. My period was suppose to come July 20th and now it's 5 days late. I don't have symptoms of pregnancy or anything but how long should I wait before I get really worried? So how long can plan b push back a period/ how long does it normally?