Blood test and calorie counting?

Hi (: I didn't know where to put this so if it has to be moved then go ahead.

I had Insulin Resistance diagnosed last year, and on June 9th I have my check-up. The thing is, this Saturday I have to get some blood test done and I don't know what to do. The test consists on drawing blood, then giving me some glucose (75 g) to drink and two hours later, drawing blood again to measure my insulin and glucose levels... So, do I count those calories and, if yes, how??

Thank you (:

No one?? D:

I really don't think it will be the end of the world if you go one day without counting.  Besides, the glucola tastes horrible.  You won't want to remember anything about the experience, much less how many calories you forced yourself to chug.