My fasting numbers

Yes, it does for most of us.  Your numbers seem to be great though.    The morning fasting numbers depend on several factors:  what your reading was before you went to bed, if and what you ate as a bedtime snack and (I think) what your readings had been throughout the day before.  So, for example, if you had higher numbers than your usual during the day because of whatever reason (like being out shopping and eating out, birthday party, etc.) and you went to bed with a higher number, then logically, your fasting number the next morning might be on the high side.  On the other hand if your blood sugar seemed very level and 'normal' one day (regular low carb meals, exercising or other prolonged activity:  shoveling snow??), then your fasting might be on the low side.  You should probably have a really good A1c.  Will the doctor do one Friday? 

I have a family history of diabetes on my mother's side and I'm trying to stop from having to take meds for diabetes.  It's a hard fight though because my body just cannot tolerate carbs.  So, I understand what you're trying to do.  I wish my blood sugar could be what yours is!  That's an interesting connection between the antibiotics and the blood sugar.  So many things we don't understand....  Good luck with the doctor's app't Friday.  I'm sure you'll do fine.