It may be different for different states, but typically, results can only be sent directly to you, if your doctor authorizes it; for instance when I have my thyroid labs, my endo writes on the lab order "copy pt", which means the lab can send me a copy; otherwise they would not be able to and I would only be able to get the results from my doctor.
Supposedly, the 24 hour saliva test is best for cortisol; to my knowledge, most blood testing labs don't run those tests.