Have you considered what you will do if the answers never come?
Although medicine had made great strides, there are still many things unknown. I will never know why my immune system "ramps up" and makes my whole body hurt sometimes. But I learned, through pain rehab, how to cope with self-care, PT, meditation, distraction and minimal (non-opioid) meds.
Many days I feel like curling up in a ball and not getting out of bed, but I force myself into the shower, go through my morning routine, do stretches or exercise or senior yoga (depending) on the day. Then I go forward and do what I can - some days a lot, some days only a little.
But pleasant things - talking to my husband, friends, kids and grands, pursuing hobbies, helping others - makes me forget how much I hurt. On the other hand, if I drop into my recliner, I focus on my aches and pains.
Have you tried to "just fake it" to distract yourself? You may find you feel less defeated.
Sue

I can relate completely to what you're feeling. I've spent years with the "what if it's something bad" mindset and though I still don't know how to stop it, I do know it's been a complete waste of time and energy! Maybe we can BOTH learn to switch the thinking to "what if it's NOTHING to worry about?!