I took plan B on February after unprotected sex. Ever since then my periods were shorter than they used to be. However, this month, July, I was 4 days late...and when I got it, it only lasted for 2 days (heavy and bad cramps on the first day) I've been having pregnancy symptoms: nausea, tired, headache, lower back pain...etc. I always feel nauseated after I eat. I had sex early this month but it was protected and we checked and found everything was fine, nothing's broken.
I had my appendix removed in June also. Would it be the cause or is it possible that I am pregnant?