No period for 2 months with pregnancy signs

The last time I can remember I having sex was on November 10, 2007. I have missed 2 moths of my period and am worried that I might be pregnant. I have cramping only occasionally and the feeling like im going to throw up, but don't. My headaches are gone though. Could I be pregnant? My boyfriend did use a condom and we checked there were no leaks. Also he really did not go all the way, he went in mostly though but ejaculated really fast after he inserted.

Please help me