It is so good that you realized you have to become much more conscious about what your body is telling you. Our bodies are so smart and know exactly what they need!
I also had a slipped disk a while back and unfortunately the pain did not go away on it's own... It took a lot of strengthening and time but the best thing that I did (I am not a doctor so do your own research) was getting PRP treatment. It is a slightly newer treatment for back injuries but it fixed my back and is now back at 100% without any pain.
Something to look into! I hope Peter heals quickly!
Sounds like there is hope for full recovery! I'll definitely look into that now, thanks so much :)