I think it can be quite normal. Monitor for any signs of bleeding

I wouldnt worry. I felt the same sensation . All was good.

I’m assuming you have a diagnosis and aren’t just guessing this is what’s happening

Definitely get some medical advice if you’re concerned

Maybe call or see your gp and check

Doesn’t that happen a lot later than that? It sounds wrong to me? When is your next appointment? I’m wondering if there should be an ultrasound earlier than normal.

Hm you would think this is more common in late pregnancy. Maybe ask your Gp or midwife when you see them for a check.