So I fixed my problem, at least for now. It was due to the clogged dip stick that was jammed full of the lactose(sugar) that didn't dissolve into the beer enough. So I'm hoping this doesn't happen again. I think I'll routinely pour a beer every day (and drink it) for the next few days until I'm confident that the sugars aren't 'sticking' together in the dip stick. On another note, the milk stout tastes great!