Suggest Treatment For Social Anxiety

Question: I am a 32 year old male. I have been diagnosed with social anxiety 4 years ago. I have been on Seroxat since then I have had good progress on the social anxiety front although I have to admit at times I did feel socially anxious. I had a problem even maintaining an eye contact with a person and used to get spaced out during a conversation. Now with the Seroxat certainly things are much better


There is another thing which keeps bothering me. When I talk I feel that my mouth movements are not how it used to be. Over the years I have observed that my speech is very slurred and as a result of this my speech clarity and pronunciation has suffered and I do not feel connected to my inner self when I am talking. The talking seems very shallow to me. The facial/lip movement seem lethargic and due to this my pronunciation suffers. My psychiatrist tells me that this is certainly anxiety related. However I do not find much help from Seroxat that I am consuming. I have also tried using Propranolol as suggested by one of the doctors from health care magic(with approval from my psychiatrist). But that also does not seem to help.
Can you please let me know what I can do do regain my confidence while speaking and how to overcome the speech slurring ?
Note: I had been diagnosed with muscle tension dysphonia in the past which causes the muscles around my vocal cords to strain while speaking. My psychiatrist thinks there could be an anxiety component to it and certainly I do observe that at a higher dosage of seroxat muscle tension dysphonia is improved. The reason I mentioned this because I would like to know if there is any relevance to the speech slurring that I am facing now.