Whilst too high, 7s and 8s are only just a couple of footsteps over the border. I don't take any medication but from what I have been told, exercise is more effective than metformin for some people, so if you possibly can, try increasing your physical activity. Cycling drops my BG levels substantially. In addition, if you can, cut down on your carbs or the type of carbs that you are eating. It is worth trying both of these interventions and seeing how it goes over the next few months.