Skin reaction after half a year?

Has anyone had this happen to them? I start doing a 5step skin routine and everything was awesome for the first few months. Then I noticed some dry patches 6months in but didnt think anything of it. Just this month my skin started itching and then broke out into little bumps. I stopped using my stuff and just wash with a gentle cleanser and moisturize every other day. What did I do wrong? Did I over moisturized that my skin stopped producing it's own oils or is this an allergic reaction. I thought allergic reactions happen on contact? How long will this last? Been about 2 weeks now and no improvement. What else can I do?