counseling with a psychologist/psychiatrist and boosting up your confidence levels. The treatment of severe blushing includes anti anxiety medicines and beta blockers.Severe cases may need endoscopic thoracic sympathectomy(ETS). If the symptoms are severe then rosacea has to be ruled out.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.