How do you deal with the pain?

I don’t have diagnosed EDS but I’m autistic and I do have hypermobility. I’m 33 and have been in pain since I was 8. As a kid and teen, I was prescribed every medication under the sun to handle the pain in my feet but nothing helped. Since I turned 30, I have regular flare-ups in most of my joints and I sometimes can’t get out of bed for days. I did some physio but it didn’t help at all and I do my best to build up muscle by going to the gym and doing pilates whenever I’m not in pain but still get flare-ups more frequently every year. What can I do to help myself prevent flare-ups and once they’re there, how can I manage them better?