How long will it be till I notice blood sugar levels dropping from diet, supplements and exercise?

BS is 310-350. Started exercise program 30 min daily and following diet to lower blood sugar levels. Doc is giving me 3 months to do this without medication. I am loosing weight. 10lbs last week I assume is do to exercise, diet and high sugar count. My question is: how long will it be till I notice blood sugar levels dropping? I am avoiding the following: refined, processed, and starchy "dead" foods such as white bread, wheat bread (made with enriched flour), white rice, white potatoes, corn, cereal, clear vegetable oils (e.g. corn, soybean, sunflower, safflower) and foods that contain high fructose corn syrup, partially hydrogenated oil, and refined sugar AND taking supplements to lower sugar levels wnaturally. Anything I should look out for? Can this be done? Thanks. PS: I did the drug route after experienceing traumatic diabetes onset after an accident but had a severe hypoglycemic shock episode last week [ had NO warning signs but could have been drug combo I was taking] thus I'm off all meds trying this natural route.