Help!

4 days ago I had unprotected sex, and I don't get my period for another 10-12. I have terrible headaches and my lower back and stomach hurts. And I have to pee every 10 minutes. He was starting to ejaculate when he pulled out. Could I be? Help me please!

Yes, you could be pregnant but you won't be able to take a pregnancy test until your period is due. Having sex 12 days before your period is likely around your ovulation time depending on your normal luteal phase (time after ovulation to a period).