I never usually drink coffee, let alone large amounts. Yesterday I ordered a large Mocha (half coffee, half choc) and drank the whole thing. For the next 8/9 hours I was wired, sweating profusely, unable to concentrate on tasks, my brain was working overtime. I felt physically uncomfortable, a little like the last throws of a stimulating drug (comedown-esque). Later on, 9 hours after the coffee I felt violently sick to the point where i almost vomited after playing a computer game.

I've had coffee before but not in the same size cup ever. My reactions have been similar but in no way as extreme.

It's obvious I shouldn't drink it at all but i'm really curious If anyone else reacts similarly, or if I have a minor condition that makes me react in this way.

thanks!