i would not touch creatine with a ten foot pole, get bloated on it. all my boyz respond extremely well though, they run it daily with dextrose post workout, or first thing in AM on non-workout days
Try using ALA 1,000mg and Chromium picolinate 600mg w/ the creatine and insulin to make your cells even more sensitive to insulin so it will be less likely the excess carbs wont be shifted to fatty tissue.
You should have lowered your doses of insulin because you wont need that much insulin because ala and cp will really make your muscle cells sensitive to insulin. Id rather take smaller amounts of slin knowing that the nutrients are being shifted to where it suppose to go than taking large amounts and turn my cells more insulin resistant and have the excess carbs turn to fat. YOur getting light headed because most of your carbs have just been absorbed like a sponge to your muscle cells. Now taking slin w/ out nutrients that make them sensitive would just make your muscle more resistant to slin which would transport all carbs to your belly.