I had unprotected sex and he used the pull out method most of the time. It has only been a day and a half but I'm really sore and tired all of a sudden. Also, I haven't eaten anything in this day and a half. It's not that I'm starving myself or anything its just I feel nausea and not really that hungry. Can these things be early signs of pregnancy?

Pulling out is not a method of birth control.
Most of the time? Yikes.
I'm not concerned about you showing signs of pregnancy so much as how naïve you are about getting pregnant, as well as diseases. You may be feeling anxious, unsure of this guy (who hasn't a clue or ounce of consideration), and feeling sick from worry about jumping into sex, especially unprotected sex.
STOP having sex, and go to a counseling clinic where a woman sits down with you and tells you for a good 30 minutes all about pregnancy, birth control, and STDs (diseases). If you need help with that, answer back.

Well first, the pull out method is not birth control. It will not prevent pregnancy or STDs. It does nothing except perhaps ruin the moment.

Anytime you have sex, protected or unprotected, you can get pregnant. Birthcontrol simply decreases the chances.

If you conceved a day and a half ago, your body does not know it yet. It could be you are getting sick, you could be starting your period, you could be having cramps from the sex. It could be many things.

If you are very concerned or it persists, I suggest seeing your doctor. Good luck :)

Ummm I don't know if this helps but when your supposed to get your next period and you don't it might just be that your stressed and worried about being pregnant. Your body might just be playing tricks on you. You could still get it just a few days later. Ik that didn't answer your question but I hope it will help in the future.