So, I finally got up the willpower to get up early, and bike to work. According to Yahoo maps, it's about 3.6 miles, and that sounds about right... I don't think it took me more than about half an hour, and I was feeling like, OK, that was a good workout, nothing too horrible... Until I actually got inside into the A/C, set my bike on its kickstand next to my desk, and sat down. At which point I was hit by a wave of nausea and had to lie down on the floor of my cube for about five or ten minutes and just sweat... I've vaguely heard of that kind of reaction, but never had it happen to me before... Not totally sure what I can do to prevent it in future. I didn't feel like I was overexerting myself on the ride; how was I supposed to know it was going to be a problem?
Oh, and after I got up, I had to go wash my hands; a few minutes after leaving the house, I discovered that you can't use setting seven on the right-hand gearshift, because it causes the chain to slip off completely. I had to stop and futz around with the chain to get it back on the sixth gear. *makes note to thwack the friend who sold me the bike*
Also, I think I may need to raise the seat a notch. (Anyone know more about bikes than me? How do you tell where the seat is supposed to be?)