I Have Been On The First Round Of The Depo

I have been on the first round of the depo shot since September 8. My lmp before that, was August 28. My only period while on depo was October 6th. I have not had a period yet. All my periods before depo were 100% 28-30 day cycles, never missed any. I am starting to feel some "fluttering" in my stomach; like when I was pregnant with my first child and she would move. I have not taken a pregnancy test, but what are the chances of being pregnant? I do not have any other pregnancy symptoms other than the small fluttering/ kicking feeling movement.