Time

It seems to me that my life, and school in particular, has a definite pattern. I always seem to have a period of time when I don't have anything to do, and I feel bad about not doing anything. This is inevitably followed by a sudden overload of work that has to be done, and often it doesn't seem that I will be able to fulfill my obligations. This is then followed by another period of rest. These cycles can be fairly short or rather extended, but rarely more than a week. Both are stressful in their own way, but when you add a collegiate cycling race weekend to the mix, it gets really hectic. Can you guess what period of time I happen to be in right now??? (I'll give you a hint... I'm not worrying about not doing anything)