A lot of comments are focusing on the burnout aspect, but I think you should pay careful attention during the workday to see if there is anything (or any person

A lot of comments are focusing on the burnout aspect, but I think you should pay careful attention during the workday to see if there is anything (or any person) that is triggering your anxious feelings. You may subconsciously be picking up on some people's behavior that you know is off and amplifying that (for good reason). Your anxiety may be a survival instinct rather than a result of exhaustion so please keep that in mind.