Do I have diabetes?

I find that getting too 'uptight' about meter accuracy and taking multiple readings with different meters is counter productive, you end up not believing anything at all ! Nothing in life apart from in a laboratory is that accurate. So read your meter and if you feel OK, accept the reading. You will end up wasting strips just for a minor difference in the readings which you can't prove or disprove anyway.

You are far better off just sticking to one meter, and taking that as a guide to your actual reading. They are never that far out that you would be put at risk.