Pink tinged discharge after sex

Hi everyone!
So I have finally reached the six week mark for post-op! I had sex on my wedding anniversary, which was just a day before the six week mark. Other than some cramping afterward, everything turned out fine. Here we are a week later and my husband and I had oral sex last night. I woke up through the night with cramps and assumed they were because of something I ate. This morning I woke up with the same pains. My BM was black and painful, and I discovered a vaginal pinkish discharge. Has anyone else discovered something like this? Is it normal?

I would call your doctor. Black stool may indicate blood. Hope you get some answers soon.