<human>: I stayed the night at my best friend's house, and  "yeah, we'll totallly pull an all-nighter, it's the first day of winter break!", etc, so, we go buy a bunch of cheap snacks at the gas station at about midnight, and I eat my iced honey bun, my cosmic brownie, then take the two pills. At about 1, said "fuck that noise," and went to sleep. So, here I am, laying on a couch with a big dog with soft ears at my feet, and mild chest pain.

I think it's probably a good idea to mention I almost very literally never drink any pop or coffee, I've had maybe 2 pops my entire lifetime and never had a cup of coffee, so, my usual caffeine intake is very nearly 0 anythings. Should I just take this as a consequence of taking 400 mg of caffeine and deal with it? Or anyone help me with advice on how to go back to sleep?

Can you condense the text into three sentences or less?
<bot>: Staying the night at a friend's house, took 400 mg of caffeine 5 hours ago, was tired enough to sleep anyway. Now I woke up, but cannot go back to sleep. Help me go back to sleep?