I feel your pain. I too just got my results back, and mine are low too. I too was very into exercise and being physically fit and healthy. I'm fatigued all day long. I too have gained weight, but my diet has been really bad.
I'm interested to know how your test of Cortef goes. I'm going to ask my doctor to be placed on it. Right now, I'm taking Isocort, but have only been on it for a week. I'm going to continue on this and see how things go. Please let me know if things improve.