I do not get normal levels after treatment

First of all, I am new in this forum and I find everything I learn from all of you.
I wanted to raise my case in case someone has happened to someone.
I am a diabetics for four years, I was treated with diamicron and I was controlled
I suffer from migraines and the neurologist gave me cortisona, as they already knew that the sugar would be shot
They gave me fast insulin, there was not enough.
Now I punctuate before each Actrapid meal and at 5 pm Lautus as my dra told me
The levels do not just download because I am always at 200 or more,
Can the cortisone continue to affect? ​​Three weeks ago I left it.
What do you think?

I do not know if the cortisone can influence when leaving it three weeks ago, but if you have those values ​​you will have to increase the insulin dose.
The actrapid is not usually used as fast, because it is a long peak.Ultra -grape such as Humalog or Novorrapid, they are usually those that are combined with Lantus.

Thank you