Crampy?

Rachael
My AF is due 10/22 and I am a little crampy but no real PMS symptoms...usually I get extremely moody and eat like a hoover vacuum...we are TTC and took advantage on all of our ovulation days. I don't want to be negative but has this ever happened to someone who got a BFP test? Or is this a sure sign of PMS? 
​Thank you!!