A few thoughts
- are you sure your levels are really going that high? Libre tends to over estimate highs which is why it is always recommended to check with a finger prick before correcting.
- when levels are high, we tend to become insulin resistant so may need more insulin to correct something over a 12.
- I find high blood sugars emphasise any ache, cough, sniff and then, the cough, ache and sniff makes my levels go even higher and it feel as if I am stuck in a look. Therefore, it is important to lower your blood sugars.
- have you increased your basal insulin?
- have you been to the doctors/pharmacist for some medication to treat your cough?