Pregnant yes or no?

On Sunday and Monday I missed my pill, I took it Tuesday and have everyday since then, however I had unprotected sex Tuesday and Wednesday. And my boyfriend didn’t pull out, I had sex again today but he did pull out this time however All day I’ve experienced headaches, cramps and now I’ve got home, I’ve gone toilet and seen that I’ve spotted!! This has never happened before, is there a chance I could be pregnant