From few months I feel crying and not able to say anything when I get upset or sad. I couldn't speak due to cry, start feeling anxiety. What is this?

Crying. for no apparent reason suggests that something is bothering you that your need to identify. Your family doctor can examine you to see if you have a medical condition such as thyroid or other hormone imbalance. The you need a safe place to figure this out. If a therapist is not available in your area consider talking w/a trusted friend or prudent spiritual leader. Peace and good health.