Q about amount of hydrocortisone

I have suspected secondary adrenal fatigue from being on high doses of prednisone long term. I did have an endocrinologist, but now since they left and haven't been replaced, I am waiting on the referral process. I was doing well on 2.5 mg of hydrocortisone, so I had started breaking that half pill down first the tip of it, and then to half. I wasn't bouncing back after 3 weeks or so. Then a huge amount of stress hit. Death in family, loss of income, ect. I went back up to the half, but I am still struggling. What amount do you guys find is needed in high stress situations?