Redfeetwall, Hello and welcome to PC.
Glad that you joined our community of well wishers and supportive people. You have asked some questions probably best suited for your doctor. Cortisol levels do rise and fall and can alter many things to include our blood sugars as well. I hope that you find the answers that you are hoping for. Someone might come along who has experienced this and found ways that have helped them control these variations or done some research on this.
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Best wishes here at PC.