How am I Stupid? Let me count the ways...

So. I was in biology today and our teacher assigned us 6 essay questions to answer by tomorrow. I, stupidly, did not write that in my planner telling myself that I'd remember them. I have lunch and two more class periods. I then proceeded to go down to the band room to get my flute, which my teacher had fixed for me. I went to my locker and packed up, using my planner to get the books that I needed. I got in the car and about 10 minutes later I realized that I didn't grab my biology stuff. I didn't tell my carpool because they had an appointment to get to. So now I have to do it in our 15 minute lunch period. Fun...