Low cortisol

Baby

So, I had a lab test done and my cortisol levels are less than half what it is supposed to be. (Normal is a 6 and mine is 2.8 or something like that) I'm very scared because it could be something REALLY bad and I've had a pit in my stomach since I found out. I have to see an endocrinologist. I'm hoping it's not the worst case scenario.