Use less coffee next time and drink broth immediately after with a castor oil pack. Waves of pain is not normal per se, but you might really be shaking up your intestinal milieu and could have a big release very soon. If it happens again after 1 more enema, discontinue them and consider using wheat grass instead. Your leaky gut might be quite advanced and the coffee is thus irritating to the lining. The wheatgrass should be more soothing.