Hi
@FruitLion and welcome to the forum.
Obviously because of forum rules, we cannot diagnose you, but the first thing I would like to ask is, what symptoms do you have, because the readings you are posting are in normal levels, except for the hypo post prandial?
Next what dietary advice have you had?
There is a sub forum on hypoglycaemia named reactive hypoglycaemia, on this site, it will let you discover similar conditions which Hypoglycaemia occurs.
The last advice is to find a doctor that will know about Hypoglycaemia, particularly a specialist endocrinologist endocrinologist who has experience with conditions such as RH.
When I eat certain foods such as weetabix, I would get similar readings as you do.
Other than the chest issues, are you on any meds that could effect your blood sugar levels?
Keep safe