Could I be pregnant?

So I started the mini pill(progesterone) Feb. 9th. And my boyfriend has cummed in me a few times ,about three weeks after starting it. I don't know if it's working, or if that even matters as long as Im injesting it😂. I was on the pill(progesterone and estrogen) a little less than a year ago but I stopped. The pill I was on a year ago made me extremely moody, my boobs hurt, and I never wanted to have sex and even if I wanted to make my boyfriend happy, I couldn't get wet enough. The mini pill I started in Febuary hasn't affected me like that has. Actually it's improved those things the only downfall is I'm getting acne. I guess what I'm saying is I really don't know if it's working and if I could be pregnant since my boyfriend has came in me. I am a couple days late but I don't know if it could be the change in hormones or if my period has shifted since I was 12 days late on my last period. Thank you!