Have you been tested for food allergies/sensitivities? Maybe you're sensitive to something you've added. The major allergens are eggs, fish, milk, peanuts, shellfish, soy, tree nuts and wheat. You probably didn't eat much wheat when you ate raw, no? Maybe you're sensitive to it or something else you're eating. Maybe a probiotic would help. They say diet doesn't really cause acne. But I think diet is a factor in most everything to at least a small extent. If you're constipated, you're probably not eliminating toxins and waste efficiently. Why wouldn't that have an effect on skin and such? Hormones play a big part in acne. So does stress. Those may be bigger factors in your acne problem than diet.
I would tend to doubt the sweet potato or brown rice contribute much to your acne flare. The wheat seems a more likely culprit, if diet is actually the problem. I don't know if it's true, but this site claims the iodine in wheat germ can cause acne flares.http://www.livestrong.com/article/34715 ... rsen-acne/
Hope you find your answer.