Chronic pain sucks...I don't have Fibro, but I get arthritis in my hand, and I also get spasms in my biliary system which hurt like a heart attack. Had that for over a year now.
Between the pain and my teenager's problems, I got really depressed, and they put me on welbutrin, which amazingly helped with the chronic pain from the bile duct...I felt like I was let out of pain prison.
My poor grandma has lupus and fibro and several other syndromes...hurts like the dickens.
I do not know if you know this but if your Grandmother had Lupus, you are predisposed to it also. Sometimes Lupus skips a generation like my friend who is 43 and has it, yet her Mom does not and her Grandmother died of it mainly because she was misdiagnosed with depression (Lupus effects the brain) and was not treated until it was too late. The Doctor that misdiagnosed it made a complete turnaround and now that is all he does because he has a modicum of decency. You really need to make sure you do not have it, gastro problems are one of the first signs. My friend had stomach cancer when she was in her 20's and she is lucky to still be around. You have to get with a really good Rheumatolgist and it may take a few visits and bloodwork before you have a real diagnosis, and Lupus is a Progressive disease that you have to watch carefully. Good luck.