Is it too late to modify your curriculum? It sounds like you would be much better off leaving yourself enough time to study math and to write your stories.
Actually my curriculum is pretty flexible. The real issue isn't time, but setting clear priorities. I'm not really good at that. I find it pretty difficult to make myself write a story, compared to almost everything else. Also, I could need a better spoon-management system.
It has been claimed on this site that the fundamental question of rationality is "What do you believe, and why do you believe it?".
A good question it is, but I claim there is another of equal importance. I ask you, Less Wrong...
What are you doing?
And why are you doing it?