I'm 37 +3 and my bump has been rock solid for the best part of 24 hours. It's getting really painful, not in a contraction kind of way but just in a muscle spasm kind of way, and across my back too. I'm just wondering if anyone else has had this, as it's freaking me out slightly, and I'm worrying baby is getting squashed in there. If I lie down and force myself to relax it loosens up a bit, but as soon as I or baby moves it clamps up again, and lasts for hours at a time. I did call the midwife but I'm not sure I explained it very well, so I'm wondering if it's anything to worry about and if I should call again or I'm just being over-anxious. Help!