Why am i constipated when I'm eating all the right foods?

It takes the system a bit to fully recover from an intestinal upset, and rebound constipation is sometimes a problem. I notice that you didn't mention any type of dairy product, and it could be that the little upset also impacted the numbers of beneficial gerbies you need in the intestine for proper digestion. There are also two kinds of fiber to consider, water soluble and insoluble. Water soluble obviously holds water, and is the lubricant to help things move along the line. Insoluble fiber is the indigestible stuff that provides bulk to move along. Your diet may be a bit too high in the insoluble sort, and too light with the water soluble type. Try eating something like prunes or raisins, eating some live culture yogurt, and if all else fails- try a glass of drinkable fiber mix- which is water soluble fiber. And back off some on the bran flakes and pasta for a bit, opt instead for a nice leafy salad with an oil and vinegar dressing. That should help you get things straightened out.