Scan, mate.....
Ya gotta have that thing checked out. I collapsed on an apron positioning home and ended up eating pain killers like Smarties on the flight back (as pax).
Eventually they dug two collapsed discs out of my back and inserted six pins, two stabilising rods and two cages to bolt my first two vertebrae to my pelvis. At the moment I have some numbness, but little or no pain. My back is almost bullet proof again and I'm flying as normal with a Class 1 medical with no restrictions.
In my case 30 years of abuse caught up with me at a bad time but I'm extremely relieved to be back at work.