I was taking the Depo shot for about 9 months and missed my window to go back. Since then I have not had another shot. I had unprotected sex with my boyfriend around August 16-28. Since then I've had light bleeding, cramps, and some milky discharge. I do think that I might have a yeast or bacterial infection. Is this signs of my body reacting to getting off of the Depo, or possible pregnancy? Please help...