Okay, I'm getting dehyadrated all day....need advice....?

Try being tested for Diabetes Insipidus.That will cause you to drink lots of water constantly.Try some prune juice for the constipation that always works for me.Also with your level of dehydration try drinking stuff with electrolites and stuff to make up for what you're losing a bit.And don't give up until you get diagnosed,some diseases are so rare or hard to diagnose,you might have to see a few doctors before you get to the bottom of this.Good luck.