Pregnant without a period??

So in February, I discontinued my Xulane birth control patch after having my withdrawal period. Since then, my SO and I have been trying to conceive. We haven't had any luck so far, and we've been trying since the beginning of March. I haven't had a period since April 13 (ended on the 16). I have a few friends right now, that are pregnant with their first child after quitting the birth control patch. I asked around and they all told me that they had been trying for a few months also and were able to conceive. They also said that they never had a period. But yet they found out that they were pregnant. So here's my question, is it possible that I may be able to conceive without having a period? I'm desperate...