Pred is just another cortizone which in any form is a bg raiser. Steer clear when possible. Have you tried nose spray. Even just the salt water sprays can help alot if not the doc can give you Flonase or similar they really speed up healing for me.
Like above not sure that a couple days are going to shoot a whole months A1c but be sure to tell the doc how many days you took the pred so he can allow for that in your results. Like in my chart I always put down when I get a shot for my arthritis so the doc can see if that affects my bg and for how many days. Helps her track all that is going on in my life. HA, Ha. As if anyone could.

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Janlaton
type 2 40 years
Avandia, Glipzide & Metformin
Grandmother to 4 wonderful children
I have diabetes, It does not have me!