Test at 30 mins and 60 mins as well as just before eating, 90 mins and 120 mins. And then at 3 hours and/or before next meal. Cover all your bases
. Then you might see the rise and fall and be able to make a graph and compare it to what looks normal and what looks diabetic. But if your metre is anything like mine, it can vary by 0.6 of a point (probably even more) so the readings may not always be accurate. So check by testing once 3 or 4 times in a row with the blood from the same pin prick. Waste of strips if you have to pay for them but mine were subsidised quite a bit so I was experimenting a lot in the first few weeks. Now, after a few months, I skip tests if I've eaten a low carb meal that I am already familiar with. My fingers are sore.
And while you are in the finger pricking mood, test right before you go to sleep, then once between 3am and 4am, and then again when you wake before you get out of bed in the morning, and then again before you eat breakfast if more than an hour has passed between waking and eating breakfast. That way you can also track whether you go low in the night and end up higher by morning, or whether you stay high through the night. You'll have to look up the Dawn Phenomenon and the Somogyi effect and work out what the level in the middle of the night means. And then when you've done all those tests, please post the results here so we can see!
Oh, and the last thing, do this before and after meal testing for at least two different kinds of meals. One meal should have a reasonable amount of carbs in it - make a pasta or a sandwich for example. If you are only eating low carb meals, your levels will look closer to a non-diabetic potentially so you'll want to see how high you spike and how long it takes to return to base after eating a meal with carbs in it to get a real picture of how your body is handling the carbs.