Boyfriend Trying To Get Me Pregnant!!

Star
Last night me and my boyfriend was having sex and he nutted in me. I gave him permission though bc we were in the moment? i've started taking my BC pills on the 19th, should they work? How long does it take for these pills to be effective? My period is also 1 day late. Idk if it's the BC that changed my cycle or not. I've thought about concieving but idk if I am ready yet.