If I try something new I test after 1, 2 and 3 hours. A CGM which monitors your blood sugar levels 24/7 gives a much better
picture. You may be lucky and get one from your Dr. I self fund and pay around £48. It's called a libre sensor and the sensor only lasts 14 days but even wearing one will tell you so much about how your body reacts to certain food/drink. If you need any more info on these let me know - happy to help.