Pink spotting @33.1

I'm feeling super frustrated. I've been experiencing spotting off and on throughout my pregnancy (5th baby). They have yet to be able to give me answers as to why. My placenta is in the right place and it always seems to happen when its been many days since sex, so I know that's not the cause. I posted two weeks ago that I had spotted at 31 wks, mostly brown with some pink for a few days, I monitored symptoms and put a call in, they said it was fine but if I was concerned go to L&D. It stopped so I didn't go ( it was only a few times when I wiped) I saw my Dr a few days later she said spotting can occur sometimes with no cause. She told me to come in if I'm dripping bright red blood.

Fast forward to this morning and its pink cervical mucus (not plug) when I wipe, again it's been many days since last sex so it's not from that, no stained bowel movements...

What would you ladies do?!