Never, ever take metformin on an empty stomach, it makes it that much worse. You keep saying you want to feel better first and then you'll adjust your eating, but you're putting the cart before the horse now. Ditch the metformin for a little while, see whether you improve, and change your diet, better yesterday than tomorrow. One of the things metformin does is suppress appetite, and with you feeling sick all the time on top of that, of course you don't feel like eating anything!
Also, with your current calorie intake being so very low, you're essentially following a crash diet. One you can't even keep down! You're not doing your body any favours with this, not at all. Malnourishment will be knocking on your door soon, if you keep this up. Forget calories, focus on cutting carbs. I assure you you'll feel better in no time at all, no more feeling ill, no more high blood sugars, no more being in absolute misery.
I could do that nurse an injury for scaring you into taking that stuff, as I know all too well how you're feeling right now. I'm so sorry you're going through this. I know it's hard to take the word of total strangers online, but look at it this way... We've been there. And if we're lying or whatever, your meter will tell you, as will your currently miserable stomach. You have nothing to lose and everything to gain, if you just start as soon as possible. And if it sucks and the forum members, me included, are full of it? You'll know before the weekend is out, I'm pretty sure.
I didn't have this place when I started, I was my own guinea pig. My meter was my best friend and all the books I read, I just tried whatever they came up with that made sense. Dr. Jason Fung's The Diabetes Code was a real life saver. I was quite dehydrated from the metformin side effects, aside from the abdominal bleeding it caused, the gliclazide wasn't any better really, and I ditched both meds with my doc's okay, after she saw how much my blood sugars improved... I've been in the non-diabetic range about 3 months after diagnosis, and it would've been a lot sooner if I'd known about this forum, and would've had less trial and error. I'm 5 years down the road and my blood sugars are still beautiful. Actually, they're better than my best friend's, who isn't a diabetic! All that without puking my guts out or living in the toilet. I just eat proper, nutricious food. No calories counted, no meds required. Just carbs cut. And I'm not alone either, there's masses of us on here.
I know it's scary and confusing. I know I cried every night in my sleep when first diagnosed. But it can get so much better.
(I absolutely adore your hair, by the way!)
