You might have over hydrated. The effects of hyponatremia are just like dehydration. It can take days to recover from. I have rescued through hikers on the Appalachian trail who over hydrated when attempting to recover from a mild bought of diarrhea. That guy couldn't walk. I've personally known people who have suffered permanent disabilities from low sodium levels.
The advice to "drink before you are thirsty" is now considered bad advice. Unfortunately I'm not making this up. Listen to your body, it will tell you when to drink.
https://www.mayoclinic.org/diseases-...s/syc-20373711