Diagnosed with gastritis/GERD & IBS via EGD&colonoscopy. Can any of these cause cramps in the middle of the night on occasion? Gyn exam also normal.

Yes both can. Gastroesophageal reflux disease GERD can cause severe cramps, especially if severe with lining compromise. Gastritis and Irritable bowel syndrome IBS can also cause less severe cramps. Night cramps can be more associatedvwith GERD after a full heavy meal esp with alcohol, where acid food mixture bridges thru esophageal gastric area and could cause dull chestvpain, cramps and nausea.