I keep getting really painful lower abdominal pain at night. what could cause it? throughout the day im usually okay. its only at night where it really hurts and makes me feel sick?

More description of the type of abdominal discomfort would be helpful to us. Nocturnal lower abdominal discomfort may be due to accumulating gas or indigestion of foods eaten earlier in the day. Try to think of triggers ( what you ate) . You could take.simethicone after supper to prevent gas buildup. If discomfort persists, see your physician or a gastroenterologist for evaluation and advice.