Am i pregnant?

Is it possible that I’m pregnant? I had unprotected sex 12 days ago the day before i ovulated and we’re 100% sure he ejaculated in me. I have been feeling a little weird eating weird things, having flutters in my stomach (kind of like spasm is the best way i can explain it), i had very dry and sore nipples a few days ago, and I’ve been sleeping more than usual. AF is supposed to come in 3 days and just very anxious and nervous! Help!!!