11 DPO.. getting worried AF is on its way.. Need Baby Dust!?? Please Help?

Hubby and I are TTC our first! Did the BD on 19th, 20th & 21st. Ovulated on the 23rd. Instead of taking a HPT early, I am patiently trying to wait for AF to come on the 6th - 3 more days! Im lightly cramping right now & Im just wondering if its PMS or early pregnancy. What do you think?? Im just certain its my period and Im starting to feel down. Thanks for any advice... Baby dust to all TTC!!!