dehydration??

Ok, I know that we are to try and get in 64 oz of water a day and that the crystal light and diet snapple count as our water. Well I have been drinking decaf iced tea, because everything else is just way to sweet for me even if I water it down. But I feel dehydrated all the time like I have not had anything to drink for years and years. Right now I am drinking 52oz of the tea a day sometimes more but never less. Does anyone know why I feel this way, should I not drink the tea? I use the restroom ALL the time, so that is not a problem. I am just wondering if anyone has any ideas. Hope that everyone is having a great day!!! Much Love, Kris