Hi Denise...I experience what is like chills without no fever. I believe that fibro can affect the circulation in some muscles which could give a feeling of being cold. But, if I were you, I would make sure that your doc has tested your thyroid function. Being hypothyroid can also cause you to feel cold even when it is warm outside. And a lot of people with fibro also have thyroid dysfuncion. Make sure they do a TSH as well as T3 and T4. I went undiagnosed and it can cause a lot of problems, and lead to death. Not a very pleasant ordeal!!!! Unfortunately most docs will only do the T3 and T4 and leave out the TSH. This can make thyroid function appear normal when it is not.......glad to see you here, not happy that you have to struggle with these issues though.