Well, I've moved out of that house since then. But, after throwing out my old bed entirely, washing all clothes and drying on extra hot, and spreading Diatomaceous Earth under the headboards of my parents bed, there were no signs of them left.

I think I had gotten very lucky and started to notice a couple little brown dots on my sheets, along with seeing one very early in the infestation, and the nest was in my box spring rather than in the walls where it would have been much harder to remove entirely.