cortisol

I am currently dealing with an autoimmune disease(behcets) which caused eye uveitis and have been on prednisone for over a year. Last year, my dosage ranged between 60–40 mg for about 1–2 months, then tapered off to 20-10 and I am now taking 5 mg daily. im 19m

Today, I received my cortisol blood test result, which came back at 0.677, indicating a severely low level. Should I be concerned about this?