Most of us will build up our stress levels throughout the day, day after day, and unless we take active steps to reduce stress, we will eventually get to that burnout threshold where we feel very anxious. Sometimes we have to take stock and make changes in our life to get out of stressful situations. It might be that a job or school, a financial problem or relationship has to be changed before our stress levels can be reduced. All of us can reduce our stress by learning stress management techniques. If you think they might be spiritual, start with the clergy.
Psychologists can help with stress management techniques.
I have little confidence in holistic or natural medicine doctors. You can be burnt out at any age. Don't worry about society's expectations. Your own expectations are causing you burnout. I can't tell what is wrong from your question, but find a therapist to talk to and try to make some realistic adjustments in your own expectations.