support for tommorrow ...

is the day for my greivance meeting , i am so scared. I never had to do anything like this , i don't know what to expect. I thought my doctor was going to write another letter for the meeting but when i called his office i found out that he resent the letter of necessity to the person that will be in charge of the meeting , i am really scared , my mother is coming up from out of town to give her statement , and give them all our family medical history, we have so many serious medical conditions in our family , my bmi right now is over 69 last time i check , i don't know what is going to happen can someone give me some advise , i am really scared i feel like i am fighting for my life.