BS readings going up with new medication plan as advised by GP

Recently my GP advised to drop Diamicron 30 mg ( used to take in the morning after BF) from my medication plan and continue with 2x50/1000 Janumet only. Although he advised to monitor how the BS levels change with reduction of dozes . He also advised if the average BS readings start going up ( above 8.0s ...,9.0s) ,I should start Diamicron again. I am almost 2 weeks without Diamicron 30 and can see that my readings are now ranging in between 8.0s and 9.0s most of the times . I am now thinking going back to Diamicron 30 addition with what I had been in the range of 6.0s-7.0s . Do you think, I should observe more days or 2 weeks are enough to conclude that dropping of the medication was not the right decision by the GP?

I am not familiar with the terms you are using Fergus ! Anyway, thanks for advice.