When he was six, he had a blood sugar of around 200 at his well child check-up. The doctor sent us home, but then called and told us to go to the ER because it had to be diabetes. When we got there his blood sugar was back in range, but then we had to follow up with the endo because they weren't sure what was going on. We monitored his waking blood sugar for months after that and now I know he was high but the doctor said anything under 140 was okay. Well not for a waking blood sugar! I'm pretty sure he had elevated blood sugars for a while, but not enough to make him experience symptoms. He had the antibody tests, and a couple of other things (I asked for a celiac screening, and she did some other things as well) and we were basically told they didn't know what it was but since he was negative on the antibody screening, that was the end of it.
The other interesting thing was that at 6 he was also diagnosed with anxiety - something that is definitely worse when he has a high blood sugar even now - so I'm pretty sure they are tied in together somehow.
Two years later, he was high again at his well child check up, but this time the doctor thought he had some sort of slow progressing diabetes, like LADA, so she didn't send us to the ER but had us make a follow up appointment with the endo again. Well in that month between the doc visit and the endo appointment, he started actually showing all the signs and symptoms. I luckily had just had all his prescriptions (strips, lancets etc.) filled so I was able to check him myself about a week after I noticed symptoms. This time he was 516, and still over 300 by the time we got to the ER. I still think he was in the early stages since we were hyper-aware of what was going on, and his blood sugar was still coming down on it's own, but I don't remember then if the antibody test was done again . . . I was thinking of too many other things!!