Hi Lilliepop, at the risk of sounding unhelpful, it depends! If I am feeling high sugar after an hour of eating I will test to check if a particular food has set me off. high carb makes me sleepy too. On a normal day I test after two hours. I have had to reduce my testing as my doc won't give me a regular supply of strips but I like to test my morning sugar to see how that is doing.
It also depends on the level of control you are going for. When I was pregnant I had to test after 1 hour to make sure my sugars were within the required range, but there is a much greater emphasis on tight control when pregnant.
If testing after two hours is working for you, I'd stick with it.
Hope that helps!