Anyonee have this too?

Okay so AF is due in 3 days.. I am currently 12dpo. Since I woke up this morning, I have been stiff. I got to work and now when I stretch I have a pulling feeling in my stomach.. I do not excersize. Havent exersized in years.. I have been with the same routine for a long time and I have never had a feeling like this before.. anyone have the same or similiar feelings in their stomach?? Like a pulling a muscle type of thing/stiff??