Good work on posting and not drinking.
Nonsense? Far from it. It is real and obviously causing you pain so no way is it nonsense.
About 2 months in I had a day where Everything came rushing in, guilt, shame, regret the works. Man did that suck. I did like you and posted about it and received much support and worked through it.
One thing for sure, drinking will only add to the bad feelings. No need to fuel the fire. Like you said, it will pass.