First of all I am no doctor so please don't take this as medical advice. This is just what I see from your example and the information that you have provided.
"Today before lunch(fast) 110", if this is fasting it is a little high.
"2hrs after 290", this would suggest that you may have diabetes, but it may also be dependent on what you ate for lunch.
"1 hr later 39", if this is three (3) hours after lunch it is either a bogus reading, you over exercised, or your body is releasing insulin at the wrong time.
Hopefully your doctors appointment is with an Endocrinologist. Good luck, I hope you and your doctor can get this figured out.
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Regards;
Danny 
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