Thanks ches and Jon. Since posting that I've actually felt a lot better, I think getting it off my chest was rather cathartic. Of course, the next day I was grilling and Bren was in the backyard with my wife and he came over towards my general area, I took my eye off him for two seconds, and the next thing I know he was grabbing the grill...luckily the handles, not the 400+ degree body. Another lesson learned...don't ever take your eye off the kid if there's even a remote chance of him getting into something dangerous.
The good news is that after sleeping crappily for the last week or so, he slept through the night for just the second time ever last night! I'm sure it was just him catching up on his rest, though.