Confused and Discouraged

So I was diagnosed with Type 2 about 18 months ago. My endo has been treating with diet only.
My FBS have been running between 110 and 120.

Then the last couple of weeks my fasting blood readings are in the 140s all of a sudden.

My endo now prescribed Kombiglyze XR 5-500 mg.

Why would my FBS all of a sudden spike up like this.

I was hoping to not need meds so now I’m devastated.

any help out there???