It's obviously better to consult a professional again. I'm so sorry your doctors haven't suggested you the right treatment. From my side, I'd suggest you try yoga. From my own experience, I know that it can help. There are specific asanas that are aimed to relieve back pain. There are many sources, like
Yanva yoga website, for example, who offer separate blocks of practice seeking to treat back pain. You can also download any yoga app to your smartphone and exercise for about at least 15 minutes every day, and I'm sure you'll feel some relief.