Am I pregnant????

I’m on the pill (birth control ) and me and my boyfriend had sex and that day I forgot to take it I looked on my calendar and it said pregnancy chance was low but he cum three times inside me , once I notice I forgot to take the pill I took it couple hrs later . Usually when I’m on the last line of my birth control I start to spot or cramp or get my period . I’m almost done (4 left) and I’ve gotten a lil cramp here and there but I’m scare that I might b pregnant. He also has a kid so in my eyes that means his sperm is strong lol