I too have always had lower back issues, but pain focused on left side. Stretching and Ibuprofen worked until something happened in December 2018 (many potential culprits, lifting, trying tennis, etc.) and it was worse than ever. Tried chiro but that seemed to make it worse. Was so bad I could not stand up, and left leg would alternate between violent cramping and numbness. Had to call EMT a few times, and I remember going to the ER on Christmas Eve (no relief, they thought I was med shopping.)
A good friend's wife runs an ortho surgery practice, they finally did an MRI, revealed my L5-S1 had not only Herniated but ruptured, and disc material migrated down the spinal cord in my left thigh. Cortisone shot relieved the pain enough to tolerate it, and had surgery in late January, they removed two hunks of disc material, each about the size of a nickel. Immediately felt better (but naturally weak), and started PT about a month after. By April, I was back playing and am fully recovered. I was also 63 at the time, so hope that gives you some confidence you can do it also.
Good luck.