This "Dawn Phenomenon" is serious business

Checked my BG right before bed and was very happy with results, 115, lowest Ive seen since diagnosed, that was around midnight. Wake up at 7am and 151, any tips on how to work around this?

Ive been taking 500mg of Metformin during breakfast and dinner, no insulin or other meds yet.

If I had to take a wild guess, lack of activity seriously rises my BG. Anyway, just a theory.