Cervical pinching

Amanda
I'm 35w3d and a first time Mum. My sister lost her first at full term so I'm a bit skittish as I've seen how things can go so wrong out of nowhere. The last few days I've been having cervical pain. It's usually after some form of activity like bending to do laundry or even just walking the dog out to potty. It feels like something is pinching my cervix and maybe a tightening in the lower abdomen(I can't be sure as I'm too focused on the pinching pain)
Some say this is effacement and others say it's the baby's head. Anyone have any experience to share? I mentioned it to my midwife today at my appointment and she said I may be starting to have some contractions but when I saw her today it had been a day or two since the pinching and it seems to have picked up a little today