I just had a load of muscle twitching in my lower abdomen. Not like having gas or a grumbly tummy or anything like that. If you've ever had that weird thing happen where your eyelid twitches and spasms, it was exactly like that, but in my abdomen. I didn't imagine it, when i put my hand there i could feel the twitching. Has anyone else ever had this? Any idea what it is??