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: Why does having anxiety drain some much of your energy #anxiety #sotired #needtosleepforhours
This tweet contains emotions: 
fear, pessimism, sadness