I developed hypoglycemia in my freshman year of college. I also have PCOS and IBS. I actually get some of the symptoms you mentioned in your daughter because of the IBS, and since you already know she has that, if nothing else shows up, maybe ask the Dr. if the symptoms could be related. I think it's due to a vagal response. Before I have a BM, I get extremely hot, sweaty, and faint. I don't even know I have to go to the bathroom yet, but there is evidently pressure on the vagus (sp?) nerve. A few minutes after I go to the bathroom, it resolves. It is worse when my IBS is acting up.
to you and your daughter and I hope you get some answers soon.