How early can you detect pregnancy?! 😨

Last week I went to a party and had sex. He didn’t use protection and I’m worried that even though he pulled out I might be pregnant. I’m almost 16 and my family wouldn’t be okay with it so I’m wondering what I should do. I’ve showing symptoms of fatigue, dizziness and hunger but that could easily be to blame for sleep deprivation maybe? My period was sporadic enough before and I could never track it. I only got it a year ago and people have stories of there period going in and out for months. It’s only a couple days late, what should I do?