BMI - body mass index. Mine is 30.4 at the last calculation - there's sites on the web where you can work out. Above 30 is classified as obese. 25-30 is overweight, 20 is ideal.
I've lost about 1 - 1.25 stone so far. Mostly thanks to the Metformin and not eating for 5 days due to acute tonsilitis (not a method I'd recommend!)
The Metformin makes me quite nauseous too. Its hard becuase I never know what I can face eating and it often leads me to eat the wrong things which acts like a vicious circle.
Perhaps you could try a month on 1000mg and then try stepping up to 1500 mg. I'd also recommend reducing your carb intake and trying to eat good carbs when you do eat them - even if you can't do Atkins or the other diets, just cutting down on sugars can help. I used to eat a lot of pasta or rice dishes, now its grilled meat plus green veg and salad for most meals. At least these days with the bagged supermarket salads its a bit more interesting. For a treat, I'll have some really nice green veg like asparagus - mmmm....
A new thing too for me is work lunches - I couldn't face sandwiches but this left me not knowing what to eat - now I make my own greek salad every day
I've heard that even a relatively small amount of weightloss can help kickstart your periods again.
I seem to have waffled on a bit, sorry!
Emma