Man, "been there, done that!" On one of my early butts, on at midnight, I did it! Didn't realize it until smoker was almost up to temp. I did the same thing - poke from below. Never happened since!
What temp are you smoking at now? Personally, I always use 235 for butts. Kills a little of the time, with no bad effects. At this point, I'd bump to 250 to get it up in the high 180's (188-190), wrap/rest and call it good!