AF due 8/22...possibly early signs of pregnancy?!

Kimberly
AF is due 8/22. My husband and I have been ttc. For the past week, my breast have been very sore, heavy, & fuller. Also, I have been experiencing cramping. Also during sex the other day, I experienced bad cramping and nausea, something that has never happened before. 
The past two days I have been peeing nonstop and have been extremely thirsty. I don't want to overthink anything, but is it possible for these to be early signs of pregnancy? I know it's too early to test since I still have a week before my period. Thoughts???