Hi Led - sorry you find yourself here. But you are in a safe place with tremendous support.
I have read up on your sitch and want you to know that I will post some advice in about an hour or so, when I have a free moment at work.
First, my VERY strong advice is before this meeting exert yourself physically. Seriously. Go for a run or bike or yoga, ride the stationary bike, something. Get the stress OUT.
I will post more in a bit.
Me 41, H 47, M 15 yrs, S11, S13 BD 1: 11/4/14 we work on it; really I pretzel myself BD 2: 3/31/15 H goes down to "dorm room" 8/15: H back to MBR 10/15: H back in dorm room 1/18: H files, now divorced