how do i explain F.M. to friends?

I recently was diagnosed with Fibromyalgia, i have a friend who is sympothetic to my pain at work, but my anxiety level is driving her up a wall, was on cymbalta falling asleep everywhere, cant remember what i said to my co-workers or boss, and also i think i brought my friends name up in a situation that was very important to one of our clients health (we work in the medical field),, i know she cares for me, but i cant take it for her to tell me to calm down anymore...i am going thru hell right now, and just want her to be patient,,,IF I WAS THAT FRIEND RIGHT NOW, what would you say to me???? I HAVE PRETTY MUCH SAID that we are working on medication that will work, to help me out, the stresssss level at work is unbelievable. my friend feels that working with me does not go as smooth or layed back as when she works with other co-workers (on my days off),, so what would you say?? this will come in handy because it will probably take a while before i find the right medication for all. my guess is my friend is not the only person i will have to try explaining to be patient with me,,and she has been.So this will helpme and maybe other readers who are experiensing similar situations,, thank you. Linda