Oh no Glask, hope she and the baby are OK, kind of puts all of our moaning and groaning into perspective.
GYo, BH can be difficult to explain because everyone feels them differently, although on thw whole a BH would be classed as a BH if your belly goes hard, it isn't true that they don't hurt, and they don't always stop if you move around. For me the difference between what I would call a BH and a proper contraction is how and where my belly tightens, the intensity of it, also, with contractions I feel pressure in my bum, but with BH there is none. Contractions tend to last longer as well, and, for me at least, have a much more.... not sure of the word to describe it, it feels like they are squashing me and the baby, whereas a BH just squashes me, really difficult to explain in words. Don't even get me started on the difference between a contraction caused by the IU and a proper labour contraction, not sure I even know myself!
Right I am off into town (after school run) I really must get started on wrapping at least DS2's bday pressies, so I need to get wrapping paper, cards etc.