this has happened several times now, where after a sudden urge to use the loo has triggered a sudden lower abdominal pain which is so severe i have been rolling around on the floor, sweating, thirsty, and hyperventilating. this lasts for about 3/4 hr and then eases, but i am left with a very tender abdomon which lasts for hours and feels that it could start again at any moment. the pain is central and feels like a gyny type pain. Any ideas?