what is this?

Zoey
I've had sex multiple times (with the same guy) the last two days. Other than that it's mostly been once a week. He pulls out & I'm on birth control, and I take it everyday at the same time. I've been on birth control for a year and 7 months. I just got off of my period 3 days ago, could it just be blood that's left? It came out as a discharge, not as a bleeding. The discharge was a dark orangish-red. Should I be worried?