I'm with the others here. I've had some bad cramps here and there in the last few weeks and they've been terrifying at the time. At the stage we're at, the ligaments that anchor the uterus are stretching like crazy as there's a lot of growth going on in these weeks. The advice I've been given is to stay well hydrated and make sure I get plenty of lying down rest throughout the day. Also, if there's no blood with the cramping then they're generally not so sinister.

Some of the cramps I've had are way worse than anything PMS related that I've ever had and feel a lot like really, really bad constipation pains for 30 seconds or a minute or more and then they go away. I've also found a link between how active I am and how often/bad they are.