Definitely take the meter back to where you got it from. Might be as simple as a dodgy battery. High blood sugars make me incredibly tired and emotional. Blurry vision is tending to drop in more now but I am not sure if its due to high sugar levels or if I have been switching from too many things like knitting, computer, reading and my eyes just get tired. Need to get my eyes checked again. Every six months is a pain but that is due to a combination of diabetes and the psych meds too. The thought of going blind is beyond scary.

Do you have the blood test done where they can average it back over the last three of four months? I find that reassuring because my doctor is happy with that and I like it too.