Please analyze the tweet "So unbelievably discouraged with music as of late. Incredibly behind on Completing my album. Not digging this at all." and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".
anger, disgust, pessimism, sadness