April fools! can i be pregnant?

So i just recently got a new boyfriend and he thought that it would be funny to tell me he got a vasectomy. He told me that his father took him in to get it done so that he wouldnt get any girls pregnant while he was still a teen. Since i know it can be reversed, though the results wouldnt be as effective i stupidly beleived him. We made love twice that day (no protection what-so-ever) and twice later on in the week. Just 2 days ago he told me that he was joking. and he never got it done. I am very scared that i could possibly be pregnant. Considering the fact that im supposed to start my period in about 7-9 days from now. What are the possiblilities that i could be pregnant?