We had intercourse when my period ended, I took the plan B, and my period now is late this month

So my boyfriend and I had sex October 15th, when my period just ended. The condom broke, and even though he didn't cum, We bought plan B and I took it, which caused me to get a heavier period AGAIN, 10 days later.. Ive read that that's a side effect of the pill. So I got my period November 3rd. We had sex again December 1st... Today is the 15th and I still have not gotten my period. I'm seriously stressing out, I hope this is a side effect of the pill still because I'm really worried. I have not taken a test yet because I'm terrified. Please help me!