I must say, your doctor doesn't sound too bright.
#1: Why put you back on if your values comes down while OFF? That'll just suggest that the treatment raised the values and will do so once you go back on. His logic makes no sense.
#2:He should also realize it isn't healthy to leave someone suppressed. Why not just LOWER the dosage instead of cutting you off completely?
And #3; 250 is way too high for replacement. Something is wrong. In fact, it's all wrong.
Your best bet-- 100 mgs a week along with the supps and a little dex. That'll fix you right up.