My daughter was also tested for seizures... but they came back negative.
When they were going through the diagnosis last spring, I had to deal with receiving bits and pieces of info from afar. It was difficult, I wished she was at home so I could play the devil's advocate... because I agree doctors can be fallible. And the university mental health counselors were not very professional, in my opinion. They threw everything in the Mental health dictionary at her...... bipolar, schizophrenia, multiple personalities you name it.... so when the diagnosis came in it seemed too basic to her and she wouldn't initially believe it.
From a far it felt more like it was, stress, anxiety, having to deal with diabetes all by herself for the first time, plus some wacko blood sugars resulting in some weird episodes where she felt she was sleep walking during the day (but nobody bothered to test her blood sugar at the time...), plus poor eating choices etc...
But she has settled on the BPD diagnosis, she is on a very low dose medication (Escitalopram), and with a renewed interest in healthy eating, seeing a therapist regularly (not a school counselor) she seems to be doing much better this year. Still I would love to hear from or talk with those parents or individuals who have dealt with BPD and type 1 for a while now. What has worked, what hasn't, what I should do to support her or look out for... thanks so much.