The date of my last period was on the 10th of May. My fiancee and I had sexual intercourse with the week of the twentieth and a few days before that. For the past week, my lower abdomen has been having what feels like slight muscle spasms every few minutes and I've felt like I've been having light menstrual cramps, but I haven't started my next menstrual cycle yet. For the past few day I have seemed a little unbalanced and my memory seems to have short circuited along with slight nausea and constant exhaustion. This morning, my fiancee took notice that my breast seem to be larger. Some mornings I have to lie in bed for a few more minute to an hour because I feel as though I will wretch at even the slightest movement. How likely is it that I am pregnant?