Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. I sincerely opine that the problem you are facing now is of your own creation. Sometimes these problems are termed obsession or sometimes anxiety. Even though you tremble and your lips twich, you are able to complete the official narration or explanation you are entrusted with. That is a positive sign and you should be confident that you are able to complete it. Practice makes a man perfect. If you are unable to complete the narration and always escapes from the scene, then you need expert treatment. Consult a psychologist soon. If you still need my help, please describe the whole problem in detail and post a direct question to me. I shall definitely help you with psychotherapy techniques to over come your problems. Hope this answers your query. Available for further clarifications. Good luck.