As others have said its really an unreliable test. As Dadcue/megz stated testing will tell you what you already know that your body is not producing cortisol. Thus you have the typical tapering symptoms. Length of time of steroids is key to how long it might take your body to restart. Go slow and try to hold course. If you can get to 1mg then mostly likely your body is restarting. It may take months or even a year or longer for you to feel somewhat normal. Most of us that have stopped steroid use feel like it has left you with an adrenal fatigue. Its going to take some time.