I forgot that coke has caffeine

last night I was hungover and had thirstiness that would not ever go away no matter what I drank. we had pop left over in our fridge..i don't usually drink pop but last night i drank like 3 cans of vanilla cherry diet coke cause it tasted really yummy..apparently that wasn't a good idea i found out later last night cause i didn't sleep AT ALL! I was super tired too and had an annoying light sleep on and off all night ..Im sure I slept but not good sleep especially for being hungover and tired usually I pass out and have the best sleeps ever when I am hungover.