Determine the emotional tone of the following tweet: "I'm also upset at my incorrect use of a comma. #grammar #struggle #hesitation #backtoschool 🎒📚". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
anger, disgust, pessimism, sadness