Well, need a bit more facts though. What, to you, is "all night"? To me that's 3-4 hours, only sleep that much before I have to get vertical. 2nd, did you take a surface temp and probe it slowly with your therm to see what the varying degrees were? Those numbers would be your answers. Probably too late now, if you don't trust it toss it. In the grand scheme of things, $20 for a new butt is a lot cheaper than $150 - $300 or more for an ER visit. Even if it's coincidental (had a flu bug but got sick after having dinner, not from the meat, but from the meal - fat, spice, etc.) You'd probably won't even want to do a butt ever again. Or if your wife found out, she'd never eat it again. So, forget the $20 bucks and be safe.