Missed my period nine days ago but on the 17th of this past month I noticed a little bit of light pink spotting, 18th didn't spot at all, 19th started spotting again and now 20th spotting. This is has never happened to me before. I just started a birth control method for the first time in July, I started the depo-provera I got my first injection July 19, 2013. Is this normal with the depo or should I still be concerned about other possibilities?

Pregnancy is always a option, but most likely shot. You can wait one more week and do a pregnancy test to check