As long as the pads didn't get pulled off when it came loose, it should be a pretty easy fix. Let me know if you don't get something figured out, we use down to 0201 parts where I work. Size reference, here is a 0402 (roughly double the size) on a dime:
https://commons.wikimedia.org/wiki/F...Femtoduino.jpg
JB Weld (or similar) isn't conductive, so probably won't fix this issue.