I have horrible concentration/focusing issues when I'm PMSing, not to mention (obviously) that I feel like crap and am completely zonked. The problem is that the next 10 days are my PMS days and FINALS time. ack. I need to be able to focus for long amounts of time...I'm talking 12-hour study marathons...and all of my finals are at least three hours long. Is there anything I can do to focus/concentrate/function better during this time?