I just wanted to first thank everyone for their continued prayers for my sister and to give an update.
She has finally
been diagnosed with Addison's Disease
, an endocrine disorder that is, thankfully, easily treatable with oral medication. As it happens, Addison's was one of the main causes for the death of my grandmother (it is not, however, hereditary). My father, who never remembers anything like this, recalled this fact after the doctor brought up the possibility. He was quite relieved to hear that it's not hereditary.
At any rate, thank you again for your prayers and please join me in offering glory to God for the closing of this horrible chapter in my sister's life.