Hershey's Unsweetened Cocoa makes me anxious.
Raw Cacao does not make me anxious. Or so it seems.
Does one have caffeine and the other not, or do they both contain caffeine?
Contrary to what most people believe, chocolate does not contain a significant amount of caffeine - about 2mg/g. It does however contain more theobromine - about 15mg/g. Both chemicals are xanthines, and many xanthines are stimulants.
Summary: both contain small amounts of caffeine.