You probably didn't know that you had it earlier, but after a while you will trace it back to something that happened to you. A lot of us had mononucleosis, surgeries, traumatic injuries or something else that triggers the disease. When you continue to have similar things happen, it can bring it out full fledged. It can also be a accumulation of more than one thing. It all happens to everyone differently. It's a deadly dragon just waiting to come out at anytime in your life. Good luck in your journey.

I gradually noticed all over pain with weather change, but it was occassionaly. I had major back surgery and I was slammed to the ground. It became a daily battle. Still is.

I was fine and then 1 afternoon I had a pain in my shoulder it got worse and spread as the day went on. By bed time I could not get up the stairs. The next day it was my back and legs which lasted for about 6 weeks then I had chest pains, stomach pains, head aches ect. Every few weeks I would get another symptom. I manage it better now and finding out what it was helped loads.

Thanks for the answers everyone mine seems to have come after a back injury and surgery started out just the back than gradual all these weird nuero type pain type tingling and soreness everywhere happened and got worse and worse until fibro was diagnosed

Mine, which is not called Fibro by my docs but still chronic pain everywhere and fatigue - came after a major surgery and getting Shingles while taking Immuno meds. I still take Immuno which dominates any meds I take, making most ineffective.
My Shingles stayed a few months and progressed to wide ranging chronic nerve pain (CNS issue).
It has progressed at some level for no reason but it is an ebb and flow. I try and get to the gym a few days to benefit my body and mind even if there is pain - need movement.
Good luck.