Suggest Treatment For Back Pain

Dear Dr.,I'm 55 Yrs old, 152 cm tall and 44 Kg and healthy woman.I have problem with pain in my back & calf and numbness from my right leg through my foot, from CT scan said " The disc spaces are preserved. There is slight anterior slip of L4 on L5At the L3/4 level there is no posterior disc protrusion. The neural foramina and lateral recesses are clear. Minor facet degenerative changes are present.At the L4/5 level is broad-based encroachment on the spinal canal by the prominent posterosuperior border of L5 and by minor broad- basded posterior disc protrusion. There is indentation of the thecal sac. Facet degenerative changes are present and there is some flaval thickening with sideways narrowing of the canal. Canal narrowing is not significant. Compression of the L5 nerve roots may be significant. The neural foramina are clear.At the >5/S1 level there is no posterior disc protrusion. The neural foramina and lateral recesses ar clear. Minor facet degenerative changes are present.Conclusion: Mino L4/5 spondylolisthesis with prominent facet degenerative changes. Compression of the L5 nerve roots may be significant. Minor L4.5 posterior disc protrusion. No significant canal narrowing. Lateral recesses and neural foramina are otherwise clear.I have physiotherapy which help a little some what.Could you please tell me that what shall I do or expected with my back , some times I feel it better after I'd passing wind or go to the toilet which I feel during exercise. Best Regards,Amanda Lou