Don't worry about it too much. This had happened to us on and off after our kids. I think sometimes DTD can stir things up a bit and if you climaxed, then your uterus can expel anything that might be left. I have even found on the odd occasion that DTD the night AF is due can bring it on a bit early IYKWIM? Although if the loss is a lot, I would ask your Doctor about it JIC, but it could also just be your AF coming back too. HTH Hana