Lyrica did nothing to help me mind you, so don't expect miracles.
I have Fibro, had it for years. I can trace back my symptoms to teen years even.
I do believe, since Fibro is affected by stress, that being transgender can aggravate the symptoms or be a contributing factor.
I know that transitioning will be stressful for me, but I do believe that it will cause a reduction in the overall causes of stress (Getting rid of the parts that cause dysphoria for example) and as such should have a positive effect on my fibro, if it has any effect at all.