Enjoy your herniated disc.
I have had mine for some 40 years now and it still comes back to harass me.
Initial treatment (after rest and pain killers) was exercise to get the muscles on my spine to build up and support the disc. Specifically, I was doing 3-position target shooting, and the lifting of the 10 kg smallbore rifle and bending built up my back so the pain went away (mostly). Probably not what your physio would recommend, but it worked for me.
Now if it gives me grief (i.e. due to gardening) I take a paracetamol and an ibuprofen tablet in combination. One of each works better than two of either.
BTW, learning to sit properly also helps immensely.