What is happening is called a false hypo.
Because your brain is so used to the higher diabetic levels instead of normal levels, once you start dropping into the top end of normal, the symptoms are more pronounced the lower you get. Your brain is telling you through the symptoms you experience it wants to be back, where you feel ok. But that is only making the diabetic levels higher if you keep feeding the symptoms of the false hypos.
If you have a low carb small meal, such as a bit of cheese, the symptoms will ease, and it won't spike you. Which is what you need, a low carb approach, lower your blood glucose levels consistently and get your blood glucose levels back down into normal levels..
Stop the spikes.
Rice is well known for spikes because of the starch content similar to potato. Which is high carbs.
All cereal is usually made from grains, and are high carbs.
Keep experimenting, knowing your intolerance to carbs is good knowledge of what to avoid. A food diary and a glucometer/ cgm is a great tool to discover your intolerance to what your favourite foods do to your blood glucose levels.
There is always an alternative to carbs!