Re: how are these blood sugar levels for someone that could be pre-diabetic?
I'm just learning these things myself, as I am recently diagnosed with Type 2. But you have to look at more than just the grams of sugar in your food. You need to look at the total grams of carbohydrates in the meal, as carbohydrates break down into sugars as they digest. Pasta, potato chips, soda, alcohol, etc., are all loaded with carbs. If you're concerned about being prediabetic (a 3month average of 125 is the starting point for a diagnosis of diabetes), then you should aim for no more than 46 carbs per meal. Simple carbs like sugar and processed flours break down very quickly and drop all that sugar into your bloodstream at one time. The french fries you had were loaded with carbs. BUT, you paired them with fish and a good green vegetable. The fiber in the fish and the green vegetables slowed the breakdown of the carbs, so the sugars entered your blood much more slowly... lower readings. Well done! The PBJ and chips you had earlier contained a lot of carbs, as did the champagne. And since you didn't pair either with a vegetable (preferably green), a salad or a meat to slow the breakdown of the carbs, all that sugar dumped into your blood at one time... higher reading.
It's really not that unusual for your readings to hit 137 shortly after a meal that is high in carbs. You didn't say what made you believe you could be pre-diabetic. The readings you mentioned sound pretty normal to me. At any rate, make sure you remember to tell your doctor about the possible cheat prior to the test. He/she may want to have you do it again.
I tested 129 when I was diagnosed and I am controlling it with diet only. As long as I carefully plan my meals, making sure to get the proper balance of vegetables and proteins along with my carbs, I do great. Today I was lazy and didn't make the veggies, and for the first time in weeks, my glucose reading after supper was 140.
If you get a diagnosis of pre-diabetes, or even if you're just concerned that you may be at risk, ask your doctor to set you up with a nutritionist. You can't believe how helpful they are in teaching you about diabetes, what triggers the high readings, what you can eat, how to plan your meals and balance your plate so that your readings don't bounce all around. Just a few I had just three sessions. But they were invaluable. I never could have figured all this out on my own. Most insurances will cover the cost of a few sessions if there is a medical diagnosis that necessitates it. If you can't work that out, visit your bookstore. There are lots of good informational books out there on pre-diabetes and proper meal planning. Some are short and very easy reads.
Good luck with your appointment. Hope you get good news.