On August 24th I had unprotected sex with my boyfriend he didn't finish inside me. I've been on the depo shot for a month already my periods have always been super irregular sometimes i don't get them for a month, but two days ago I started getting light cramps with brown discharge it's still happening right now. I know the depo shot makes your body seem like it's pregnant so it doesn't actually get pregnant is that what's happening or is it that I can be pregnant. I have no other symptoms but the brown discharge which isn't a lot not even enough to fill a panty liner and cramps.