I have been bloated, gassy, rumbling in the abdomen and sometimes sharp pain, always dull pain. There is always a sharp pain right below the sternum, my abdomen is very distended, so if I apply a little pressure right below the sternum it s sore. My bowels have changed. Dark, some solid with water substance, sometimes not at all unless I take a laxative. I look 6 months pregnant and this has just happened in the last few days. I am 56 years and female. What could this be?