I've left doctors' offices agitated like that more than once. 90 minutes is a long time to wait. 5-10 more minutes would have just agitated me further. I have my days, and definitely my breaking points.

Fruit is a pretty good idea if you think low blood sugar is the cause of his dizziness, although milk (especially with something like graham crackers) is a better choice. 100 isn't very low, even for a diabetic, but a definite possibility if he's been running high.

I'm sorry about the delays and forgetting the CPAP. It was good of your brother to get it for you. I hope you have a good day today