Too much Tea?

I'm a big time tea drinker, but lately I've been thinking that I've been drinkin gtoo much tea. Is it possible?!? I've been drinking tea since I can remember, at my house 4pm is tea time with bisquits and all. I take milk and sugar wiht my tea. Earl Grey is my fav. though followed by English Breakfast and since last year Awake from Tazo. There is also a buch of chinese teas that I like. Their names are weird. Back to my tea problem. Not sure if its cuz I'm tired or if I'm low on electrolights but I've been feeling really dehydrated. No matter how many cups of tea I've had. Lets see..today I had about 7 cups. Still I feel parched. ? don't know. ^_^