Emailed that I wouldn't be able to come in due to exams. I understand 99% perspiration in life, and you have to commit. However, after two years of working with them, I would have expected to have had an indication that my job was in jeopardy because of final exams (which I find utterly ridiculous).
Secondly, my boss knows quite well that my aspirations are geared towards med school, hence this semester is extremely important for me, academically. I have feelings that there is dirty plan involved, and that they are taking advantage of this situation. They know I'm graduating soon, and are willing to dispose me off for a younger student who they can get a few years out of. Regardless, of all this, I'm stil pissed.