Pain/Cramps when baby turns. Normal?

[FraggleRock77]

As the title states. I'm nearly 21 Wks and when our little boy moves/turns i can feel everything. It is really painful/uncomfortable and will stop me in my tracks. I'm small and short and there is not a lot of room in the middle. It comes as quickly as it goes.
Is this normal?

I use to get that a bit, not that painful, (also short) it eased off after my uterous grew a bit more though so i think it was just while the bb was a bit big for the avaialble space, (37 weeks atm)

Thanks PM. I was expecting this later on in pregnancy but not at 21 Wks. I'm hoping my uterus will hurry up and grow. I asked the consultant today and he said everyone experiences movement differently. It is just really unsettling x