OK well I had sex three days after my period and I don't know if he came in me but I felt like a liquid or something drip down to my butt. The next day I woke up and my stomach was hurting really bad and I was on the toilet twice. I just want to know could I get pregnant or could I already be?

Any time you have sex, pregnancy is possible. Even if he doesn't ejaculate, there's more than enough sperm in pre-ejaculate (which all men produce when aroused) to get the job done.

Do you know how pregnancy works? You would not be feeling pregnancy symptoms the day after you had sex. You wouldn't even be pregnant yet. Do some research on pregnancy to better understand how it works.

As for your dilemma, you'll have to wait until your period is due. If you miss it then wait a week or two, then take a pregnancy test using first morning urine. If that test is negative then wait until your next period is due, if you miss it test again or see your doctor for a more accurate blood test.

If you're not ready to have a baby, you really shouldn't be having sex.

Good luck.