lower stomach pain around the same time everyday, and other symptoms too Hello, I am 22 yrs old, and I eat healthy, and drink plenty of water. For the past 3 days, I have had debilitating pain in my lower stomach, and get headaches. I have lost my appetite, and when I eat (even when I dont eat), I get this acid burning sensation in my throat , and vomit. I know this sounds nasty, but even after I eat, there are no junks of food or anything, just pure dark acidic fluid. Along with that, It hurts to have bowel movements. I am also constipated( The pain i mentioned has nothing to do with the pain some people usually get by trying to go to the bathroom while constipated. it is a very different type of pain) . The pain in my stomach usually occurs around the same time everyday. It feels as if my stomach is fine in the morning, but towards the end of the day, the pain starts to kick in