If I mix a pea sized amount of my nightly RetinA with equal amount of a moisturizer, am I getting the full prescription strength and benefit of Retin A? I have lots of irritation after two years of nightly use and my skin is completely rebeling. I'm wondering why now? I am now in hyper mode in trying to fix. Is Retin A, Drunk E. C, and a 12% Gycolic Acid cream, applied nightly, too much? If so, could I apply the vitamin c and glycolic for daytime? I use spf between 30&50 everyday. I am 52.