I suddenly felt cold and shivered for two days more than a month ago. Just today, 18 degrees, I wore a short shirt. I don't feel cold, but

The body has chills and tremors, and it is considered that there are diseases such as a bad cold and autonomic nervous disorder. If it is not caused by a cold, it is considered to be autonomic nervous disorder, often accompanied by symptoms such as palpitation, chest tightness, chest pain, sweating, and poor breathing.

Suggestion:

It is necessary to go to the hospital for diagnosis as soon as possible, and to use some drugs to regulate nerves, such as Guweisu tablets and Xiaoyao pills, which have certain curative effects.