Hi, Matty, welcome to NeuroTalk!
I'm very concerned about your experiences when drinking, I'm sure it's not unheard of, but it does sound quite extreme.
I would feel a lot better if you visited your physician for a check-up and explained this to him/her.
Can you do without the drink or is it a weekend "must" for you?
I know a few older alcoholics whose minds are not as sharp as when we were young. Much of their lives has been seriously disrupted due to the drink. Please consider what your life may mean to others and see if you can't skip a few weekends.