There are two ways to approach diabetes, one is to wait and see. The other is to be proactive with medication at first, which it seems is your doctor's approach.
You have already made an excellent start, the meds will hopefully get your BG down even faster and make control through diet and exercise that much easier.
Once you get that nailed you may well be able to reduce or stop the meds, you could think of them as a temporary solution, like a spare wheel until you get the puncture fixed