Hi my sugars are really bad at the moment especially of a night. I take my bloods before bed and all I am getting is the word hi on my blood monitor. So the other night this happened and I ended up taking over 400 units of novorapid to make them come down. Through the day no matter what I eat for eg a banana I have to take 50 units of insulin. Could it be possible that the insulin might not be working for me?