Glad you can see some positives, ((GeminiNZ)).
Something I find helps both with pain and flashbacks is the breathing exercises I was taught at the pain management clinic many years ago. Have you come across these? I can go through the idea if you would like me to, if you haven't.
Warmth and something soothing can also be helpful, depending on the type of pain. Gentle stretching, if it's safe for you, may also help a bit.
Gentle hugs from me, hope the pain dwindles a bit for you.

Bluegrey