Hi brenn,
I also found naltrexone - and actually every other pain killer I tried - didn't make any difference. I think this is to do with the nature of the pain signals in fibro.
I really recommend you start here:
I am not a doctor or anything, just a person who has lived with fibromyalgia for several years now and has done a lot of research and trial and error experimentation. What follows is just basics. There are a lot of variations. You will find your own versions of everything I say, as this is not a...
www.fibromyalgiaforums.org
Sunkacola's advice is excellent, and while it might not seem like all those little lifestyle changes would make a difference, with some commitment they really truly do.
From there, I'd have a read through here on the forum! The tough thing is that fibromyalgia isn't a one-size-fits-all thing to treat, so it really helps to read what others have been doing and treat yourself like a bit of a guinea pig until you find things that do help you - once you start stacking the right tactics, it can be transformative. That's what many of us have found success with, so worth the effort! 🌻