It turns out my vent may have been fueled by a bit more than annoyance. After I tried to go to sleep last night, my stomach hurt. I wasn't sure for a while if my dinner was going to come out in a hurry, from one end or the other. By the time I finally started feeling better, Trystan woke up and puked all over me. Poor little guy. After I got him cleaned up and changed into fresh jammies, he went back down and slept really well until about 8 this morning. He woke up, had some breakfast (milk and baby oatmeal), a bath, more milk, and was back asleep by 10. It's now 12:30 (local time) and he's just now waking back up. My stomach is feeling better--though it did feel the need to empty its contents in a hurry when I woke up.
Man I hate getting sick. I'm not good at recognizing that my horrible moods are caused by not feeling well until I really fall awful. Blech.