Hello there,
It sounds to me like you are sensitive to
caffeine.
Caffeine is found in
coffee, tea, coca cola and chocolate.
Caffeine is a stimulant. It also makes
your heart beat faster. I don't think you have an allergy to caffeine, but
rather what's known as a sensitivity to caffeine. Caffeine stays in your
body and in your system anywhere from 8 -10 hours. If I were you I wouldn't drink anything that contains caffeine at night, especially coffee.