Hi there
@Truffle 01 it may or may not be related to your food. If you are just finger pricking you may not be getting the full picture. A finger prick, as I'm sure you are aware, just gives you your BS in the moment. Have you tried using a CGM device ? That will give you a far better idea what your blood sugars are actually doing throughout the day. Without a CGM you do not really know what's going on, other than how well your body is dealing with the carbs you are eating . That is all it tells you. A CGM would give you a better idea, if you haven't already just to see whats going on.
I would also add that not everything is related to blood sugars, blood pressure, lack of sleep , exhaustion and dehydration can also present with those symptoms.
Edited as I repeated myself