Late period or Pregnant?

So I had my period April 7 - April 11 and my ovulation day was around my 20s or 22.

If I had unprotected sex on the 19, and 20 could it be possible that he might have got me pregnant?

I am already a mother of a boy and this would be my second pregnancy. I am experiencing some emotional changes that are going bananas and must admit I am feeling a bit exhausted each day. I am on day 4 late on my period.

My next period was May 5 and technically today makes 5 days of being late thoughts on just a late period? or could I really be pregnant.

Not to mention my son is extra needy and wants my attention 24/7 and tatrums have gotten horrible especially since i do not want my partner around i am super emotional