Hello and welcome to e health forum.
The symptoms mentioned are not due to the umbilical hernia surgery, that you had undergone previously.
The causes of such symptoms cannot be determined exactly without a complete physical examination and a few tests to rule out common causes.
Some probable causes include - thyroid abnormalities, panic attacks, anxiety or mood disorders, neurological tic disorders, etc.
Hence you might consult with a doctor, who can examine you and advice you accordingly.