Verbal Dyslexia??

Your thourghts are getting a head of your tongue, it's a form of stuttering. Try taking a deep breath before staring to talk and s l o w down the rate of words you are speaking. It is a tecnique that is easy to learn and after a while will become second nature to you. When writing it is usually a case of your thourghts getting ahead of your hand, also the way a word is said is often not the way it is spelt so it is difficult. Don't be to hard on yourself.