Based on my experiences recovering (took years) from a couple of back injuries, please consider the following:
1) Comfortable/well supported bed. I ended up with a memory foam mattress/foundation on an adjustable frame. Replace your mattress at least every 5-8 years or so. If you've gained/lost weight, maybe you need a different firmness? I read a study today that states men need from 6 to 8 hours of daily refreshing sleep to stay in good health. Women need 7.
2) Make sure your shoes are in good shape. I purchased a pair of new, light weight, trail runner shoes from Nike. Very supportive, good traction. Maybe performing in something like this might help. Wearing them every day helped me by stopping the transmission of vibrations that I got by using shoes that had much less padding. .
3) I also had custom formed inserts made to correct for discrepancies in my walk/balance. These can be moved from shoe to shoe, even wearing them indoors with slippers helps.
4) +1 on seeing a doctor/massage/acupuncture/chiropractor.
I visited them all. Got cortisone shots/pain pills at first to relieve terrible pain. After awhile I started physical therapy which really didn't do that much.
For my first back injury, the adjustable bed (put legs up to relieve stress on back)and new, supportive shoes did the most good.
For my second injury, the massage/acupuncture (11 months of over all massage and sometimes very site specific massage. Sometimes very deep treatment-I teared up many times-it had to be done

) and chiropractor (6 months of treatment-done after the massage/acupuncture) did the most good for me.
5) I also suggest in taking some OTC vitamins specifically D3 and a super B complex to assist your immune system and healing. It took about 6 months to get my levels up. YMMV. Getting lab work done to determine your current levels is the best thing to do.
FYI:The top D3 lab test level was recently increased from 70 to 100; meaning it's been recognized that we benefit from more available D3 in our system. Getting a bit more daily sun is helpful as well. YMMV. Getting sunburned does not help.
Also, the top B12 level is 1100. In my experience, getting my level up (545 to 1038) has really helped in reducing fatigue and increasing alertness.
As a quick fix , I'd seriously consider the stage bass stand. I suggest you paint it black and wear black clothes to conceal it as much as possible if you're concerned about that type of thing. +1 on getting a chambered bass to reduce weight, or, having your own basses chambered.
In my experience, your injuries can become permanent and disabling so sooner is better than later to get started on figuring out what to do and getting treatment.
If there's a teaching college nearby, you can get reduced cost treatments.
Good luck.