Hi ya tx. I have this all the time apart from when I was shovelling food in my mouth. Food contains a lot of water so you need to compensate. I have always been a thirsty person, so much so my Dad gives me a hard time about drinking so much. Anyone would think it is booze!!!
Anyway if you need water you need it!! If I don't drink enough I get headaches, I am miserable and really ratty. We are all different so listen to yourself. You are the expert of you. Sorry if I sound over bearing, I've had a lifetime of people telling me that I drink too much. I have been checked at the docs many times but I am all clear and healthy, well apart from weight lol!!!
Do you have other symptoms? Have you been checked by your doc, just in case?
Xx