As type two diabetics we can't deal with carbohydrate, sugars and starches, so it is a good idea to test after eating to see what you can and can't eat whilst keeping your blood glucose in the normal range.
Hopefully as you are about 3 months from diagnosis you will be due to see your nurse or doctor again, and perhaps they can help with whatever it is you have done by putting yourself on a starvation diet. It is not, as far as I know, a good way to either lose weight or try to get blood glucose under control, it certainly isn't sustainable.
Metfornin is not a medication you take to remove glucose from your blood in the same way as insulin. It acts very differently - though it can cause sensations of nausea amongst a number of other unpleasant side effects.
In the mean time I'd suggest trying to eat a low carb diet, so any meat, fish, eggs cheese, full fat yoghurt, cream or creme fraiche would be OK, along with salad stuff and low carb veges - roasted or stirfried is good.
I only need two meals a day - but I keep them as varied as possible, and a couple of times a week I take a multivitamin and mineral tablet as it is advisable to ensure adequate intake of such things.