I Was Prescribed Norco November 29th After Undergoing Hip Replacement

I was prescribed Norco November 29th after undergoing hip replacement surgery. I usually take twice a day but a couple of times I only took at night and replaced day time dosage with Advil. I am on Norco right now and feel like a different person. I find myself cranky when not on it and in a great deal of pain. Is it too early to become addicted?