some interesting observations you bring up. I have no advice but I'll share my experience. When I was drinking pretty heavily every night, about late morning early afternoon the next day I found talking difficult, clear thinking difficult, the same with writing. At the time I didn't know it was the alcohol but I do now. I couldn't wait to get home and have a stiff drink because my brain would "unlock" and I would think a bit more clearly....for awhile. Then of course I became drunk and it was bedtime. It was a horrible cycle.
You're pretty young, glad your aware of it. I know you've seen doctors but getting a second opinion is never a bad idea. doctors are human.