I dont think it is ketones cause I tested this morning when I felt funny (like fake hypo symptoms).
Most of my pre meal sugars are below 7 and can be in the 4's pre lunch.On occasions like this morning when it was 5.6 pre breakfast I think it is the increase in bg which is making me feel too weird/causing breathing problems etc.
Am going to mention all to consultant cause on premix and the rapid bit on insulin in the mix is to my mind not 'strong' enough to counteract higher bg (was still at 11, 2 hours later) though intermediate 'background' bit of it seems to be fine as most pre meal readings and fasting bg are fine.