Severe anxiety , moaning, clenching jaw.

My mother 70years,asthama patient. Recently had covid pneumonia,discharged one month back. She is very anxious,moaning sometimes,coughing If she is listing to something or if we engage her in talking,no moaning and cough. If we  talk ,sing she is even passing urine,stools pleasantly Sometimes she is becoming more rigid, clenching jaw She is having frozen shoulder from 6 years,we are having physiotherapy sessions after discharge from Nov 15th.This is the first time she is having physiotherapy sessions. Specially after physiotherapy she is becoming rigid clenching jaw After physiotherapy 3 hours she is rigid , clenching jaw, moaning. In the morning right after she is awake,she is loose all her joints are very flexible.Her left hand was so rigid but in deep sleep there is no rigid at all. What is this condition? We are not using any pain killers or muscle relaxation medicines? Is there any medicine for her condition?