Depo-Provera

Hello everyone, new here but thought I'd jump right in. (I came here for answers or advises) So I got the Provera shot about a month ago, for those that are not familiar with the Depo-Provera is a birth control method that's injected and it's supposed to be for 3 months/every 3 months. Before I got it, my doctor told me my period might stop. So my period did stop because it's late for 16 days. however today when I woke up & went to the restroom, and I noticed a little pinkish discharge, when I peed, it doesn't hurt or itches or anything is just that. I thought I might start my period, but it doesn't look like my period, I know my body so I know it's not that. & I've used the restroom like 4 times since I woke up and I keep seeing a the very light red discharge, is not as much is in little quaintities. Some women told me they got pregnant while on the shot, so I'm wondering if it might be that. HAS ANYONE GONE THRU THE SAME?. I NEED SOME ANSWERS LOL ps: I did have sexual intercourse with boyfriemd the day I got the i got the shot, and he ejaculated inside me.