AF due 9/1 - so anxious to test!!! Anyone else?

AF due 9/1 and I have been feeling so weird! About two days ago my stomach felt so tight like I did 1000 crunches, my thighs have been cramping for 2 days, pretty sure I saw a sign of implantation bleeding yesterday, and I've felt a little nauseated on and off the past couple of days. 
I don't want to get myself too excited and I feel like it's all in my head!! Anyone else have similar symptoms? Or anxious to test?? Only a few more days!!!