Please help!!!!!

This month I have had sex with a condom, I have had anal sex multiple times, I always wipe the semen away to hopefully prevent it from dripping down.. On day 24 I took a plan b pill after having anal sex on day 22, I was worried semen dripped down.... Now today I am at Day 28 (the day I am supposed to get my period) and I haven't gotten it yet. I haven't felt any signs of pregnancy, but I am still worried... Should I? Or are the chances slim? Please please please help me!! I feel like I am fine just because of the factor of me only having vaginal sex one time and it was with a condom, and multiple times with anal, and I know the chances are slim for getting pregnant from anal sex. Is it the plan b making me late ?