Anyone else have this happen to them??
I don't have that going on (I'm also not having sex though), but I do know that due to the increased blood flow to your cervix, it's very likely that your cervix got irritated and that is why you have the pink CM. Some women even have some spotting after sex. If you are really concerned about it, call your doctor though and see what they have to say.
I agree with PP, it's not uncommon to see some spotting after sex or other activities that irritate the cervix.