bloating when hungover

Whenever I drink heavily (like over 7 -8 shots id say), i make sure to drink plenty of fluids. Sometimes this makes me piss a lot (obviously) BUT, even if i dont go to the bathroom at all and stay hydrated, i experience the worse bloat and dehydration when im hungover the next day. it lasts ALL day. like i can drink 3 liters of wayer over the course of the day im hungover, and pee MAYBE once! also, it seems none of the food i eat is digested when im hungover. does anyone know why this is, and how i can fix it, or at least lessen it? thank you!!