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: I'm also upset at my incorrect use of a comma. #grammar #struggle #hesitation #backtoschool 🎒📚
This tweet contains emotions: 
anger, disgust, pessimism, sadness