Spotting after sex

Stephanie • My names Stephanie, I`m 25, a wife and mom to two kids, and expecting #3!
I'm 27 weeks and ever since about 20 weeks I've spotted nearly every time we've had sex(only about once a week). I've talked to the triage nurse before and she said spotting after sex is normal...but is it still normal to have it nearly every time?
It's bright pink, only when I wipe, and doesn't last long so I'm not overly concerned.