You have my sympathy.
Though I will say it gets worse when you have several stories in the same universe, and then two completely separate universes, all in your brain at one time.
Im on vacation right now and my brain is so loud at this point it's just incomprehensible screaming.
I wish my brain could focus better:
Hey, this would be an emotional scene! Just need to figure out how the heck to get to it.
Hmm remember that one scene you finished months ago? I don't like it anymore, change it.
Maybe you should try writing smut set in your world. Why? No clue.
You should post some random worldbuilding bullshit on tumblr!