Hi,
I am seeing that this is a 3rd chakra problem. Something in the lungs. Something from childhood that caused you to feel like you had no room--couldnt breath.
I used to have a similar problem. I would start out talking about something I felt strongly about and then in mid thought, it would just dissappear. Leaving me to feel like a bit of an idiot. Like reading a poem I know by heart and freezing up just close to the end. It used to always happen.
I did some meditating on the problem and I finally heard the little voice inside of me saying "I know you are going to screw this up" etc.
I dont think the problem is so bad anymore, but I tend to live a rather secluded life these days.
I have never heard of a problem like yours, where you can continue to talk but just black out the details. Very interesting. Its like when you hurt yourself really bad, the body goes into shock and you dont feel the pain anymore. There seems to be something so painful for you that you have to "leave the room"
I will send you some Reiki.
Peace
Angie