Thanks. Yes I will. Never had anything like this before
I don't suppose you have any strips from a different batch (i.e. batch number), or even a different meter (and strips obviously)? Unfortunately, now you've triggered all that lovely adrenalin, that won't be helping matters. Although, it shouldn't put you right up into the teens.
As you have ketone strips, would it be worth a quick stab onto one of those, just to see what impact there might be here?
Sorry, that last bit is really an "as a matter of interest" suggestion, rather than anything helpful.