Hi you should connect with a counselling psychologist , as they will help you understand the reasons of this change in Behavior and work on it.
We cannot diagnose the issue with little Information.
To calm your mind please try yoga or meditation.
We use various techniques to empower the mind to create a healthy belief system.
Next Steps
Hope you feel better soon . All the best
Health Tips
You can reach out if you wish through Practo , for online consultation : Neha Ravichandran