Help please

I’m on BC but I know I have missed or taken it late maybe a couple of days out of the month, but for the most part I take it regularly at the same time everyday. My boyfriend accidentally came in me Tuesday night and I immediately after took the plan B pull just in case. I had been having some spotting before I ever too the plan B, but I’m scared I might get pregnant. What’s the likely hood? How long do u wait to take a test?