I got my first depo provera shot around the beginning of June. For July I would spot, as expected. But for some of July, all of August, and now September, I have been having what I am not sure is dark brown almost black discharge or spotting everyday and it hasn't stopped. I always have to be wearing a pad, but I know it's not a period. I have had constant unprotected sex since the beginning of July (all with the same partner) sometimes more than once a day.. About 3 weeks ago, I began to randomly get dizzy, and now I am always tired and exhausted. I am due for my next shot around September 13th. Is it likely that I am pregnant?