Hello. I'm experiencing quite a number of hypers - the insulin just doesn't seem to be working! I've changed all the cartridges and pens but still no improvement. The only way I've been able to reduce bg to an acceptable level is by exercising. I imagine it's due to slowing down for the holidays but the high bg is making me feel uncomfortable. My pulse seems really exaggerated in my head arms and legs. Has anyone else experienced this symptom?