Try and deconstruct the problem in your mind.
Definitely write it down. The way you stated it above made it kind of hard to wrap my mind around it. Not because you mispoke at all but because its a complex problem.
Sometimes its caused by a few girls in the chapter that have a certain attitude that becomes infectious . . .
Edited to add:
Is the problem just in chapter meetings? What is attendance like at events? Are there a lot of events?
What is the chapter size compared to the campus average?
Sorry to answer your questions with questions but more information helps.
But in the mean time: Take extra care of yourself physically. The problems will be much worse if you are not sleeping enough, eating correctly etc.
