I get them. It's a horrible icky feeling LOL
Exactly how you described. It's like a pulling feeling. I don't get them quite as often now. Only when I move or turn quickly. Then it's a bit uncomfortable. And this morning I seem to have developed a new pain. Dull aching (like muscle ache) all along the lower abdomen.
I'd say it's normal and if your midwife doesn't seem bothered then don't let it concern you. You said walking helped? Then use it to help. Maybe a bit of slight stretching will help too. Whenever I've had pain I try to bend towards it. That's helped alot with me.
However. Reading your posts you're not really having good luck with midwives are you?

Maybe ask another doctor if it bothers you too much.