Possible?

So I really hate having to ask because I could jus wait an test, I had sex about 3 1/2 weeks ago I’m on the pill but I don’t remember how long I have been on the pill since we started not using condoms. He came inside me about 4-5 times since then, recently I’ve been getting minor headaches, cramps and my boobs are sore here an there, when I was pregnant with my first I had no symptoms and didn’t find out till I was 11 weeks. Is it possible to get pregnant off the pill??