Well about a month ago my boyfriend and I had sex for the first time. He did use a condom, but the next day we had sex again and he used a condom, but afterwards he went in without a condom. He didn't do anything (that I'm aware of) but my period is a week late and I have not had any signs of it and my boyfriend keeps joking that I'm pregnant. For the past few days I have been able to smell EVERYTHING and it makes me sick to my stomach. I have also been very tired and been peeing like no other. Could I really be pregnant?

Yes you could because all it takes is one little sperm for you to have a baby

The girl should always know what is the pregnant?
You can choose to test paper and went to the hospital to consultation.