Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much.These speech slurs / not uttering the right word at the right time even though it is in the brain is due to stress or strain. Mind body coordination is essential. Speech is actually performed with the help of vocal chords and is physical or body related. If body is tired, stressed, desired kind of activity is always jeopardized. Worry about this worry also gives additional worry. For now learn to ignore the problem. Along with it, learn to relax. If you are a teacher, take rest in between sessions and don t over strain vocal chords. Don t worry. Your problem should be cleared just by this method. Hope this answers your query. If you need more of my help on this regard, please post a direct query. Please provide every details as possible. I shall teach some tailor made psychotherapy techniques which should be of immense help. I am always available to clear your doubts. Good luck.