Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Been up since 4am. Too scared to go back to sleep #nightmare — feeling scared
This tweet contains emotions: 
fear, pessimism, sadness