You have to test before you start eating and then about
two hours after you finish eating. If you don't test before you eat, then testing after you eat means nothing.
Here is a link to a website which gives you all the information you need about
blood sugar and this page talks about
what normal blood sugar is:
www.phlaunt.com/diabetes/16422495.phpBe familiar with that site and you will learn a lot. There is a search box in the upper right. Click on the "Home" slot and then go from there.
It says most non-diabetics' blood sugar will be under 120 about
two hours after eating. At any given time during the day (random testing regardless of time, eating etc.) a non-diabetic's blood sugar would average 83. This is according to Dr. Richard Bernstein, who is a type 1 himself. He has written
Diabetes Solution which has a lot of information about
blood sugar, diabetes, medication, food, exercise, etc. including recipes.
Let me give you two examples of testing after meals (this is called "post-prandial"). Let's say you eat and then you test two hours later and it's 120, but just before eating your blood sugar was 85, which is normal. Another time, you test two hours after eating and it's 120 but just before eating your blood sugar was 110. Whatever you ate in the first case caused your blood sugar to rise 35 points. But in the second case, whatever you ate caused your blood sugar to rise just 10 points so obviously that's a better outcome even though both times your post prandial was 120. So, if you can keep your average blood sugar in the normal range and you eat as I described and don't overload on carbs, then your post prandial reading (remember, that's 'after eating') will be in the normal range,too.
This is why choosing your food carefully is important. Of course you're also dealing with another health issue, gastritis, so you need to be careful about
that, too, but I believe you'll be able to eat pretty well despite that and the diabetes/blood sugar problems.