Dry, broken out skin?

The skin on my face used to be really really oily and gross, so I have a lot of achne products to dry out my skin and it worked pretty well. Now however, my skin is really dry due to a gradual change it diet (i used to live on greasy foods.) The only time it ever gets oily is if I get really stressed out. It's flaky and dry and breaking out, I bought a neutrogena moisturizer for combination skin and it's keeping my skin hydrated, but I'm still broken out on my nose and I can't use any treatments that will dry out my skin. So what should I do?