So me an my bf had unprotected sex, and he didn't finish in me but just in case I took a plan b pill. A week later I had my period like normal, this was exactly a month and a week ago. After that period ended we had sex again, it was unprotected, and we use the pull out method. Now my period was due on the 27th of January and it hasn't come yet. I'm really worried what do you guys think