jacked lower back from pullups?

If you hurt yourself sneezing or turning your head your alignment is off.
Check out "Pain Free" by Pete Egoscue
He discusses stuff like this in great detail.

it's lower middle

hmmm yeah I'd think about seeing a doctor.

Is it muscle pain like say from too much deadlifting?
And do you use momentum in your chin ups?

i saw a chiro even though i dislike them usually on account of their occasional BS placebo ways. but it's cheaper than a real doc and i got a deal with x-rays and all. waiting for that result to show by monday. i used some momentum in my chin ups and pull ups but i think the main issue is that i was squirming trying to get that extra few pushed out. after 5 days the pain is slightly better today so maybe it is just a severe muscle tear. i have never in 5 years of training hurt myself so bad from regular exercise.

thinking maybe i should go hit a float tank to give my body a little zero G recovery time.

Problem is you should never squirm with parts of your body not intended to be in the exercise.

Putting your legs in chin ups for example.
best of luck with it thogh.

Everyone loses their exercise form once they get fatigued. Same thing as people making mistakes rolling because they gassed out. You just pushed your boundaries a little too far... now you can make the necessary corrections next time you train.

indeed, lesson learned, thanks all.

probably cheated with the pullups and swung with the lower back

or you were too tense and weren't warmed up and you just pulled something

probably both but i suspect the former was the real damage. i have a pull-up bar in my house and i felt like it was being underused.