Yes it will take some trial and error to find out what carbs your body doesn't like. I would stay away from "toast" at first if you're having problems keeping it where its supposed to be I would shy away from "breads". Remember to balance your protein with whatever carbs you eat.
Are they having you check after an hour or after 2 hours?
If its after 1 hour then making you stay under 130 is very strict! I have to be under 140 in the 1 hour range. I had my special low carb cereal for breakfast today and instead of using my low carb milk, I used half and half... number was 111 after eating, so that made me happy. The bread I use is 5 net carbs per slice, so I can also eat an egg and cheese sandwich for breakfast. I also bought some granola bars that are high in protein and fiber. I can eat those for breakfast too if I want something quick. I also bought some canned soups for lunches and stuff. I found some soups that have 9-13 carbs per serving. A lot of the cream based soups are lower in carbs and also ones that have meat in them. But of course, I can only eat a serving of that which is usually 1/2 to 1 cup. I also found a special brand of yogurt (called Siggi) that has lots of protein in it and low sugar. I think it has 12g carbs for the full container of yogurt. So, I like to eat those as well.
Personally, I have to stick to 1-2 servings of carbs when I eat. The dietitian also told me I could have like 2-3 servings per meal and that was just garbage.
I do find though the more protein I eat with my meal the more carbs I can tolerate.
I am also able to go out to restaurants and eat as long as they have online nutrition information I can look up.
And Oneway, if you want cake..... then make cake!!! Tonight, I am making a devils food cake with butter cream frosting.
I ordered it from my low carb website and its "diabetic" cake but it had really rave reviews. So, I'm going to try it. We went grocery shopping today and I also found an actual Pilsbury "no sugar" premade cake mix with a matching frosting. I had never seen them carry that before...so I bought that too.
I was also bad today and ate an entire cream filled doughnut! I ate one of my protein bars afterward to try and "balance" it a little bit hehe and my number was 129 when I checked, so that made me happy.