Please help with my skincare routine!?

Hi, I have really oily skin and large pores and have been researching new products to use to improve it. I changed my cleanser from a No.7 (Boots) creamy cleanser to Biore Pore Perfect Oil-Free Ice Cleanser, and changed my moisturizer from Simple Hydrating Light Moisturizer to Biore Pore Perfect Shine Control Moisturizer. I have also used Olay's Regenerist Microdermabrasion & Peel Kit once, and I have started to wear Philosophy The Present Clear Make-up underneath Bare Essentials foundation & mineral veil. The oiliness of my skin has improved and the pores on my nose look more refined but now I'm getting sore, red, dry, flaky patches on my cheeks and around my mouth! Is this just a reaction to the skincare routine change, or are the new products actually harming my skin? What should I do - stick with the new oil-free routine or go back to my old routine? Or compromise?! Sorry for rambling but it's driving me crazy - I can't seem to get the balance right! Please help - thanks a lot!