Yay, what good news about your appt. with rheum. #3. And I like that he scheduled you for followup in 3 months; it makes such good sense to keep close tabs on a new patient.
I think 2.5 mg of Prednisone is a very low dose, but I hope others share first-hand experience. (As comparison, my SIL took 60 mg at one point, which may be the max, I'm not sure.)
May this mark the beginning of a better chapter in your life. Let us know how you're doing. With best wishes always, Vee