Task: Analyze the tweet's sentiment and assign it to either 'neutral or no emotion' or one or more of the specified 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