Hey, take care of yourself. I know how easy it is to become overextended. I actually got an ulcer when I was 15 - too many extracurricular activities - drama, choir and my confirmation class, among other things - and that was *gasp* before the Internet was around to distract me. Not that life's gotten any easier, but I have a lot more control now.
Anyway, you'd better let Forrest know if you're not going to be able to revise Chapter 1 of Eternal. The worst thing you can do to someone is to promise something and not deliver.
Good luck with the violin.