7 DPO what do you ladies think?

I am 7dpo, my boobs are a lil sore off and on, last night I was laying in bed and my uterus felt heavy like I had rocks down there. Anybody know what that coukd mean AF is not due til 11/10 so I havent tested yet. Sometimes it feels like it is going to come early but when I go to the bathroom and wipe it us nothing but CM  I have had mild cramping as well, any advice would be great, thanks ladies!!