Uncomfortable Hangover

In prep for St Pattys this weekend, I need some advice on how to approach my hangovers. In the past I would have a day full of eating and drinking water, have two coolers then wake up throughout the night. When I wake up, I feel slightly nauseous (not enough to throw up but enough to keep my jaw clenched) and I have stomach cramps. Sometimes this can happen with one drink that I have while eating dinner. Usually when I drink I make sure to have Gatorade on hand but last time it did nothing.

Any suggestions on what try next?