Glucose & BMI questions

I am in the early stages of getting approval. And I am borderline for their acceptance limits. 40 BMI or 35 with a co-morbidity. ( Luckly, at this point i do not have heart disease or high blood pressure. Unsure of sleep apnea)
 
 I believe I am considered pre-diabetic.  Before I got good insurance my doctor gave me an at home test to check levels off the books. 

waking 102
1 hour after eating english muffin 190
2 hour after eating 156

I understand this is just under the official "diabetic range".  I need help.  For my 5'6" size my waist is 46".  I am 46 year oild female and can't seem to get the scale to budge.  I'm hoping this surgery help but I don't want to wait another x amount of years for my health to continue to deteriorate like my mother and grandmother (who were not overweight).

My question is how can I get the highest readings possible for the official glucose test? 

also, when I look up BMI charts there was a chart that took into account my waist size which made my
BMI much higher.  When getting pre-approval do they use the standard BMI one size fits all chart or do they take into account female and where fat is being stored?

any help would be appreciated.

I would run these questions/issues by your health care team. 

Best of luck!