Anxiety disorders come in many shapes and sizes within mental health issues, but they all have one thing in common.
A belief that something bad is going to happen, and you won't be able to cope with it when it does.
Anxiety is usually future focused, because you are thinking (or catastrophising) about what might happen. It can create a huge swell of panic and adrenaline, and for some people that can take a long time to subside.
Anxiety makes people feel scared. Scared of embarrassing themselves, scared of being triggered, scared of having a panic attack.
Living like this isn't living. And the only option is to face your fears.