Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: when u havent learned to swim 🤔 but you keep working out so you're denser and less buoyant 😞 but swimming is scary 🤔 but also u cant swim 😞
This tweet contains emotions: 
fear, pessimism, sadness