Hi,You must see a doctor immediately.Your story sounds a lot like mine with the stomach pains and cramps but,not necessarily does yours have to have the same outcome.I also went first to my OBGYN who found nothing but sent me for an ultrasound.In any case I firmly impress on you not to delay going to see a doctor and getting a few tests done.I first had an ultrasound which showed a slight thickening of the colon wall.You say your ultrasound was clear which is positive.I was then sent for a colonoscopy which is where my tumour was found.This was followed by a CT scan.
Surgery and chemo,no eight months down all is well.So get up and go to the DOC to rule out any doubts.