I've had crushing fatigue for a long time now. A lot of it's probably depression-related. But for the past 3 months a new symptom has emerged that's incredibly disruptive, namely wild blood sugar dysregulation. I haven't tested my levels, but have suffered from hypoglycemia (not to this extent, however) all my life, so can recognize it. Basically, any formerly useful compounds like caffeine etc. are just crashing me further and causing bottomless hunger. It's costing me a lot because if I go out for the day, I am constantly eating. I'm seeing a very good GP (maybe for the first time). Each appointment is an hour and he encourages you to email etc. He said he believes it's hypoglycemia based on my self-reporting, and that the best test is a 4-hour glucose tolerance test, but he doesn't want to necessarily put me through that to confirm what's probably obvious. He wants to prescribe an anti-depressant for the mood/fatigue, which I'm fine with, but I was also wondering if there was any testing I should ask for, since the amount I'm eating to stay level clearly isn't normal; I've gained 12kg in 3 months. Someone on another forum suggested hypothyroid can cause blood sugar dysregulation and that the standard thyroid test most GPs ask for isn't enough -- that one needs to request a full panel. Is there anything else I should request? Can GPs check other hormone levels, or would that be an endo's province? I'm a little bit nervous to ask, since I don't want to seem like I've just done some basic online research, so I guess if anyone had advice about the best way to frame these requests, that would be helpful too.