Hi,
Exam stress and some type of symptoms during stressful works are natural... Most of the times without using any medicine and just with some relaxation/meditation techniques can be cured. You need to focus on your breath with closed eyes and no other thought.
Do take care!
Next Steps
It's better to consult with a psychologist/therapist to help you for proper treatment step by step.
Health Tips
Mindfulness
Self-confidance
Self-esteem
Trusting and believing yourself are really helpful