First of all, how old are you?

If you are under nineteen, your body may still be changing and it is, very possibly, your hormones just doing their thing.

But take a test. Please. Just make sure that you are not before you do any more drugs or drink or anything to that extent. I have a friend who was just virtually forced into having an abortion because she refused to take a pregnancy test and continued drinking and doing drugs--it pretty much destroyed the baby before she had a chance to let the doctor do it.