From what you are saying....I wouldn't think that you are...But hey, i'm not a doctor! Have you got any strange symptoms...Cramps, dizzyness, headaches, tiredness, hunger?
I would suggest, to help ease your mind, take a pregnancy test.
I would also suggest that in future, don't have sex or any contact between his bits and your bits without using a condom! Not just because of the risk of getting pregnant, but also because of std's and aids.
I hope that everything works out for you.
Xx