Hi..your right, your Dr. is a bit useless in the fact they didn't explain a thing to you. The numbers you are posting is 106 which should be your fasting glucose and the 6.2 is your A1c which is your average BS for 3-4 months.
What you need to do is search the web for low carb and low glycemic foods. There are many veggies and fruits which do have more carbs then others. Please don't panic as you can eat many
foods you just need to do everything in moderation.
There is no one diet that fits all as what might spike my BS may not spike yours so when you try anything new test after to see if it spikes you or not. I eat oatmeal and it has no affect on me yet others can't touch it. If you haven't already gotten yourself a meter..get one and test, just don't go nuts. Start off with testing your fasting BS when you wake in the a.m. and have had nothing to eat for at least 8 hrs. then test 2 hrs. after starting your biggest meal, which mine is my dinner around 5-5:30. Eating smaller portions of food more often during the day is much better then not eating and then having a huge meal.
Trust me, many folks here will give you tips on what to do so read and read some more as this will educate you. With an A1c of 6.2 your basically pre-diabetic and with a good diet and exercise you may never need to go on meds. but if need be, it isn't all that bad.
Hope this helped some and good luck...JJ...