blood testing

The dr has ordered up some cortisol testing, done at 8 am and 4 pm.  Wonder if that is to rule out other diseases that can cause my symptoms.  My mood is so low, i cry every day in spells.  My councelor says that it has to do with an emotional part of my brain that is overactive right now because i am off my anti d meds.  So when a hear a sad song (when i am stuck in a car with someone else in control of the radio, lol)  i cry.  I am learning to cry very quietly with my head turned away to avoid detection, learned to do that on the bus trip home last summer when i had med problems then too.     At least i know it has a physiological reason and i just have to get through it.  On the bright side, i can empithize better with people with they are experiensing these things, no matter what the underlying cause.