My blood sugars have been crazy the past few days, I don't know whats going on. They're around 20 after my meals and just wont go down to anything reasonable despite taking more insulin than I usually do for my meals.. i've not ate much at all today ( an egg & toast for breakfast and a baked potato for lunch) and there stuck at 17 at the moment?? I'm not unwell (that i know of) Just waiting to hear back from my diabetes nurse but i'm not sure she'll be able to shed any light on this. Is it possible for my insulin to stop working (Novorapid)? I have changed vials thinking my old one had gone bad? not injecting into any lumps or dodgy sites. Any help would be appreciated!