I Am Missing My Periods Since 1st March 2016. And

I am missing my periods since 1st march 2016. And I had unprotected sex in april and still missing my periods. But there is no vomiting or nausea. Morning sickness is happening very rarely. I dont have sore breasts also. I have gained little weight but that maybe because my physical workload has reduced since a month. I dont have food cravings more than the usual ones. I dont have headaches. But is there any chance that I might be pregnant?