Me an my boyfriend tried to do it for the first time but it hurt so bad that half way through I told him to stop.
He was wearing a condom.
Also my menstrual cycle last month (February) was on the 14-18 and I haven't got any signs of it. Why is that? He said not to worry and jut relax but I can't. Thanks in advanced.

You had sex therefor it IS possible. (he doest have to finish to knock you up)

It's that simple.

Word of advice... stop listening to what he tells you. He knows far less than the thinks he knows. YOU are going to find yourself a single mom alone if you follow his advice.

And its still way to oearly to know for sure if you are or not... you need to be 2 - 4 weeks LATE of a persiod to take a test and have a chance at an accurate result.