The thing that kept me calm is the fact I had many blood tests done before I did the fit test and they were all within range so when the fit test came back abnormal  the doubts started to creep in ,but I couldn't change the result so just had to keep remembering blood tests were satisfactory and I thought what will be will be and the fact I'd been there before , I hope tomorrow goes smoothly for you and that your appointments are soon and as you say finding answers and getting back on track instead of in limbo .