Speaking of calluses, get a stone for the shower to smooth them down and get rid of them. I thought calluses would be a good thing so I didn't tear up my hands constantly... Wait until you rip one off while you're hanging from the bar, it is far from pleasant. I use a stone about twice a week since that day haha.
God that sounds absolutely horrible - I can't imagine trying to bang out 7 more pullups while having a raw spot on my hand grinding on the pullup bar. I will definitely look into getting one, that is some good advice.