Day 3/4 was always a tough day for me. Day 3/4 on a Friday was a deadly combination. My brain would really go into overtime to get that bottle bought on my way home, so I know exactly where you are coming from. Just climb back on the horse with the knowledge of what your addiction is going to be telling you and try to blast through those days. I wish I had better advice, but I am pretty new to sobriety myself.... I will say that after that 4th day, I could rationalize and deal with that voice much better. Good luck on a sober rest of your weekend.