I was diag. w/IBS just recently due to a tender stomach exam and intermittent diar. w/const. My stomach tends to "blow" up at night and by morning it is back down to normal size. But for the past few days it has blown up to a considerable size, very uncomfortable from my rib cage to groin it looks like I swallowed a watermelon! At first it was just uncomfortable and I was still passing stool normally, but last night and this morning there has been incredible sharp pains in my lower abdomen, feels like a "hot poker" in my rectum and the pain comes and goes the longest it lasted was 3 hrs. I layed down with a heating pad and it subsided a bit. I took a mild laxative this morning after this and nothing happened. I drank a bottle of magnesium citrate (spelling?) with no results. What the heck is going on? Is this IBS or should i go see a doc?