https://www.mind.org.uk/information-support/types-of-mental-health-problems/anxiety-and-panic-attacks/symptoms/

These can include:

• feeling tense, nervous or unable to relax
• having a sense of dread, or fearing the worst
• feeling like the world is speeding up or slowing down
• feeling like other people can see you're anxious and are looking at you
• feeling like you can't stop worrying, or that bad things will happen if you stop worrying
• worrying about anxiety itself, for example worrying about when panic attacks might happen
• wanting lots of reassurance from other people or worrying that people are angry or upset with you
• worrying that you're losing touch with reality
• low mood and depression
• rumination – thinking a lot about bad experiences, or thinking over a situation again and again
• depersonalisation – a type of dissociation where you feel disconnected from your mind or body, or like you are a character that you are watching in a film
• derealisation – another type of dissociation where you feel disconnected from the world around you, or like the world isn't real
• worrying a lot about things that might happen in the future.