Pain condition

Need help. 2 months ago I finished a rather intense workout and immediately started feeling itchy. It then seemed to turn into burning on my arms and legs, back and neck. It has not gone away and has been very debilitating to say the least. I’ve been to several doctors and had several tests done. Luckily- nothing serious has been found. When this happened- I wondered if this is what Kelley went through with her pain condition. And if so, I’d really appreciate any advice.