What do you guys think ?

I had sex on the 11th December and the condom broke the next day I took plan b after a week I bled for 5 days as if it was a period and now I was supposed to get my period these days and seems that I'm late by a few days my breast is sore since yesterday and my body is swelled up a bit ! My breasts usually get sore a few days before my period but I'm scared that I might be pregnant now. What do you think ? Will my period come soon was that bleeding a good sign that plan b worked ? Will my period come soon ? Please help me I'm stressing out