Hi and welcome,
I have a rare condition that I produce too much insulin if I eat the wrong foods (mainly carbs). There are certainly more similar rare conditions, which can have similar symptoms to most diabetic and endocrine conditions. Most GPs haven't a clue about the complicated process of digestion and how to put in place the correct dietary advice, other conditions such as thyroid will also play havoc with not only your health and how you feel. It will depending on meds, stress, depression, anxiety. have an effect on glucose levels.
It does seem to me, that with your other issues, that getting the timing of the finger prick test, to be before breakfast, as long as it's not straight away after waking. Then with other meals, a pre meal test followed by a two hour test after first bite.
If you record everything to do with testing and foods you are eating. You will get an idea what is going on, even if you don't know the reason.
I send my best wishes to you, I myself have had a rough time in the last eighteen months, and I am taking baby steps in recovering from it. Don't be too hard on yourself, hoping this will help, I can't diagnose you, cos it against forum rules but because the information is not there, if you are having hypos and bewildered by the doctors, ask for a referral to a specialist endocrinologist who has had experienced non diabetic Hypoglycaemia or type two with no meds, having hypos.
Best wishes, stay safe.