dehydrated....again

what is this the third time ive been dehydrated enough to notice it in the last month! might not have been that many times but im thinking it was actually more than that :S...its happening way to often and its happening enough to make me realize i have to start noticing what im drinking...its probably not a good thing if i really really have to think about it to remember what i have drunk in the past couple days...bad me for not noticing i wasnt drinking enough and purging prolly helped nothing at all...i dont know why i have to keep getting so darn dehydrated...because now i have to drink and it sucks because now i feel so full and im still so thirsty ..and im trying to drink water and it makes me want to go throw up anyway...i put a couple bottles of water in the fridge so i would have them already cold so i cant say i didnt have none to drink...ill make sure i at least finish those tomorrow...i dont think there 20oz bottles though, i think there the 16oz bottles but ill check in the morning and see...i think im gonna have to start buying gatorade again...i can drink those pretty decently and there not way to many cals for a drink...will see the next time i go to the store though..im heading to bed though...really tired..after i finish my water that is :S