Ive been at 160 mcg for a few days now, and the sides are hardly coming now or they dont last very long, at 80-120 id get the shakes and headache but they would go away, now at 160 they dont bother me to the slightest, but I know going that high is a bit much, should I just stick with 160, or go up to 180-200? Ive been using Prosum.