First I would ask around and talk with people who are pleased with their PCP - one who listens and looks at the bigger picture and not at separate symptoms. Then weigh the pro's and con's of changing doctors. I have changed in the past when I came against a brick wall and neither the doctor or I agreed on treatment. There is nothing wrong with changing - it just means you do not mesh.
If you are not ready for a change, ask your doctor for a referral for a second opinion. Two lines of thought are always better. Your doctor should be open to this. If not, your really should take a long hard look at your primary.
Finally another option would be to see a pain management specialist who can review all that has been done and make suggestions on what steps to take next. I have a lot of faith in my neuro but he was very open to my seeing a pain management doctor when nothing was working. Both have come up with a treatment that has begun to address the pain and bring it into a controllable range.
Hopefully things will change for you and your will find some level of control. I know the problems you are having. Chronic pain can become a vicious cycle that robs you of sleep and energy. Don't give up - there is a doctor out there who can help you.