With fibro you must react to 11 of 18 specfic pressure points in your body. I had 16. Usually you feel worse in the morning. I feel like I've been run over by a truck. A good rhumy should be able to do this. There isn't, as yet, a blood test or x-Ray to determine fibro. There is some info coming out with MRIs. There are over 100 symptoms for fibro, sometimes it has no known cause. I do have PN in addition, it was confirmed by EMG. So you could have both. I also have OA