I was just wondering the same as Phoebe, did the test give you any answers?
Reactive hypoglycaemia is something most of us are probably not too knowledgeable about to be honest because I believe it's quite rare. I was diagnosed with reactive hypoglycaemia in my 20's, I wasn't diabetic then, in fact it was related to another condition called Elhers Danlos (genetic) which causes in some of us autonomic dysfunction where various automatic processes in the body go a bit wonky (blood pressure, irregular heartbeats, random blood sugar stuff). I had the test you're talking about along with others, mine showed I didn't overproduce insulin, I just produced insulin very very quickly, so basically my blood glucose would dip because the insulin was there before the food had fully digested, then the ship would right itself when the food was finished digesting, that's one perk of type 1, at least I don't have to deal with that joy, pancreas can try and mess with me but she's got no juice😉 . It can occur in people prior to a diagnosis of type 2 I believe, but that tends to be because the body is initially slow to react to an increase in blood sugar, then panics and over produces insulin when the blood sugar rises above a certain point. So in the test they're looking at how your blood sugar behaves, non diabetic people have surprisingly steady blood sugar because the body reacts appropriately to an increase in blood sugar. So in a non diabetic person they'd eat and digest the food this might shove the blood glucose level up to say 7mmol/l, the pancreas will already have rallied the troops to send insulin to deal with that, then if it continues to rise it will send out reinforcements. In reactive hypoglycaemia it's thought to be more like this, the increase to 7mmol/l is ignored, the pancreas forgot to rally the troops, the blood sugar then increases more, this triggers the red flashing button in pancreas HQ because increasing blood sugar is a red alert type issue. Pancreas gets a bit flustered and interprets this as an emergency situation so she sends out the troops in force, they shower the blood stream with insulin on the understanding that this is a sustained attack and the blood sugar will keep rising. It doesn't keep rising though and you find yourself with too much insulin which gives you a hypo.
There are very many theories about post prandial hypoglycaemia though, and my knowledge is based on the explanations I was given 20 years ago so might be out of date. Let us know how you went on with the tests 🙂