Hi Julia, yes, it is from the Fibro, and in time, it will lessen and go away.
Mine has returned a few times over the years, but only briefly and not to a high level. When I was at the beginning of Fibro, I would have to go to bed with no gown on, and ever so gently put just a sheet over me, as anything at all that touched my skin caused excrutating pain. Be well.