HELP ❤️❤️

HELP okay so 3 weeks ago I had unprotected sex with my boyfriend and 6 days later I forgot my pill and took it 18 hours later.. now I'm waiting on my period ( because I skipped my last one ) and it's meant to come tomorrow, im showing early signs of pregnancy but I'm not sure if im just freaking myself out.. these include, headaches, dizziness, constipation etc plz help me idk what to do ❤️