Answers please ladies.

I had sex on my last ovulation day, which was April 15, then my birthday come around (April 28) and went off may 1st. Now my nipples are sore, I'm a little more tired, eating habits picked up a little and i have littke cramps here and there, but im going to be ovulating again in 4 to 5 days.. Could I be pregnant or am i just losing my mind.