Help. Could I be preganent?

Patient: Me and my boyfriend had protected sex for the first time on March 14,2012. The day after I took the plan B morning after pill and then on the 16th till now I have been feeling full like I only ate breakfast and I dont feel hungry at all throughout the day. The condom did not break either. My last period ended on March 6th and because due to stress sometimes it doesnt come at all. Is this a sign of pregnancy?

Doctor: