Update: Never in serious danger. My opponent (who was the CL earlier) wasn't really aggressive enough, and I took 1st. Also, I think my HU drawing has improved--- I'm more willing to draw to a J or stand pat with a K/Q if that's my best option.
Once I did that after he limped in. He drew one and made a wheel; I had KQJ92. It was easy not to pay him off.
2nd place also had a lot of bad luck with making pairs against me, but usually that was his own fault for drawing too many cards.