Implantation or from BD?

This month my husband and I only BD 3 days before ovulation. 11 DPO we had sex, when I went to the bathroom afterwards, i had light brown/light pink disharge. Could this possibly be implantation bleeding or from having sex? There was a bit, but since then there has barely been anything except this picture (I didn’t get a pic of 11dpo unfortunately). Period is supposed to start in 2 days. Anyone had this happen and ended up pregnant?