True.I used to think why I feel exhausted just by talking but I think it's due to how there is a constant battle in my mind to stop my stuttering(substituting words etc). Needless to say I am covert stutterer which REALLY makes it worse..like I am even scared to speak infront of my family as even they don't know much about my stutter.In fact most of my friends don't realize I stutter unless I tell them.And yes I think letting go of control might help but in my case it just seems impossible :(