Could I really be pregnant?

I have been trying my best not to jump the gun and assume I am pregnant, but now I am starting to actually wonder. Here is what happened. I had unprotected sex Sept 18. I took Plan B the next morning. I got my period Sept 24, it seemed like a pretty normal period. I then had sex again Oct 1 and Oct 4. Both of these times he pulled out. According to my calendar I should have been fertile both those days and ovulating on the 5. My period should have started October 19 according to my calendar. I am now 19 days late.

For the past few weeks I have been abnormally hungry,tired, and experienced constipation which is not normal for me at all. Yesterday and today are the only days I have felt any sort of nausea, which is why I sort of started to freak out. I am wondering if these symptoms and the fact that my period did not come this month could be because of the Plan B, or could I be pregnant?

[Victoria01]

Well, there is really only one way to find out. You need to take a test. Good luck.