Not sure what to say....what were you eating before, and what are you eating now...how are your bg levels?
If you are hungry...eat more? Are you alos trying to follow a diabetic diet and lose weight? Should be possible...I know lots of people do a low carb diet and lose weight. I am not especially low carb, but lost weight eating smaller meals and following a weight watchers approach...ie, eat what you like, but it is the amount that matters. I was fairly low carb, and wored out my carb insulin ratio and went from there.
Personally, i wouldn't toch an appetite suppresant, or metaformin, unless I needed it for medical reasons. Nothing wrong with metaformin, but if you are not insulin resistant, why take extra meds?