I don't know, @PemW... how "low carb" are you eating? Specifically, total carbs/day is the key.
If you're eating more than 10-20g/day, the ketogenic adaptation doesn't occur from what I've read (I haven't done it successfully myself, but gave it a shot and quit for exactly the discomfort reasons we're talking about here).
Anyhow, just to be sure, I want to ask: Is there a possibility that you are underfeeding yourself now because of fear of raising your BG and it staying there stubbornly? Think about it carefully.
I ask because reading your posts here have such a ring of familiarity to me. I remember those feelings. Playing a game of chicken, basically, with your glucometer.
If there's anything to this, please don't torture yourself by witholding calories when your body's screaming for them (the headache, fatigue, dizziness, clumsiness, muscle pain, irritability -- that's hunger, not diabetes!). This is a long-term problem, damage coming slowly over a long time. There really isn't any benefit in torturing yourself over the next 3-6 months or so as you and your health care team get your management all dialed in. The BG levels you're living with right now are not acutely serious -- they are more diagnostic, than poisonous. If you were sporting 600, we'd be having a different conversation.
So, in my amateur educated opinion (which you can assume is that status of everything I write, I'm not a physician) relax a bit (maybe quite a bit ) about your current BG levels and what you're eating. Don't try to bring your BG in range right now by witholding necessary nutrition, including carbohydrates.
Again in my opinion, I'd set aside the very good, excellent advice about low-carb diets and nutrition for a bit. This is important to take a look at, and adopt, after you have your BG under control and well-managed. At this point I think it's putting the cart before the horse, and causing you unneeded pain and suffering.
EAT! GO HAVE A SLICE OF PIZZA! You'll feel a lot better.