4 months and just now discovering forum roleplaying, huh?
I sometimes suffer bouts of it myself(2-4 days, usually. quite mild as far as insomnia goes), and actually discovered forum roleplaying during one of my first really bad ones(got maybe 4 hours of sleep in one week), right after getting my first laptop, great way to pass the time when you can't sleep for extended periods.
just avoid anything philosophical, combining philosophy with sleep deprivation leads to rather nasty existential crisis, speaking form experience.