Yep I got that too. I'd get nasty pain & I'd start to worry I was about to miscarry then I'd realise I had an urgent need to go to the loo. Problem solved. It was very scary due to my m/c history but I was always relieved when the urge hit as I knew it was not baby pain.

I only ever had it happen during my successful pregnancy, not during the ones where I miscarried.