Just a thought maybe you have too much in the brain going on. I would say think of your brain as a bee hive. The bees inside are your thoughts emotions etc. The hive is full but more new bees aka thoughts emotions learning want to come in.
when the new bees enter there isn't enough room for them. Then it becomes a swarm of bees and everything is chaotic. Making it harder for bees to go in or go out.
I hope it makes sense it has helped me. And the brain needs healing and recovery as well like a muscle being over worked.