Cramping, one irregular period breast tenderess and irritabi

:D Hello everyone.
I have been having unprotected sex with the father of my son for the past three months.
Last month I had a very short very light period. Lasted all of three days.
This month within the last two weeks I have started with cramping and back aches, breast tenderness and irritability.
I didn't have any of this with my son.
Could this be pregnancy.
It's too early to test!

Thanks for your help!