Magnesium helps with pain, and so does Vitamin D......the Vitamin D is quite amazing......but they are high doses so I would check with my physician. As well a very small bit of hydromorphone would be very helpful in getting you to sleep....perhaps 2 mgs. If you take the tumeric, you must take it with pepper, it makes the tumeric work better. I just found that out too, I cook with it a fair bit and use black pepper with it. Apparently the combo makes the anti inflammatory aspect of tumeric work. But it is a very mild anti inflammatory. I would check about the Vitamin D....and don't let them tell you the blood test for Vitamin D is normal......chronic pain patients have a higher requirement for Vitamin D. So, don't go by blood tests.

I found if I take an antidepressant at bed time with my pain med it helps much better...

Try oxycodone 10 mg to help with pain and sleep.
If you ask a good Pain Management Doctor he, or she, should be able to prescribe this low dose for your back pain and help with sleep. Tramadol is extra strength aspirin to me.
Keep up finding a good Pain Doctor to help with your sleep problems.

Not sure if cannabis is legal where you live. I get the lozenges and take 1 at night. Helps me sleep better tasn anything else I've tried. Ambien, trazadone, gabapentin, lyrica, tramadol. Even better than my oxycodone. I do take that during the day but don't need any at night with the cannabis.

I take a trazadone every night and it helps me go to sleep. I am hazed in the morning but that goes away fast. Using for ten or more years now. Not addictive at all. I also have a bad case off fibomyalgia for the last 15 years, but I know it started slowly way before that.