What is the ruling on my intense anxiety and nervousness when speaking to people, especially when clarifying a specific matter, which prevents me from demanding my rights at work and from leading a normal social life?

To rid yourself of the anxiety and tension you feel when speaking to people, place your trust in Allah, and then in yourself, and do not belittle yourself. Consult a psychiatrist, for the Messenger of Allah, peace and blessings be upon him, said: "Seek treatment, O servants of Allah, for Allah has not created a disease but that He has also created its cure, except for one disease." They asked, "O Messenger of Allah, what is it?" He said, "Old age."