Hi, dickyru, and welcome! I'm so glad you found us and joined in. I have never heard of fibromyalgia being diagnosed with just leg pain. Fibro affects all four quandrants of your body. Nearly all of us have neck, shoulder and back pain. Yes, our legs can hurt too in addition to that. I think I'd get a second opinion just to be sure. I'm not a doctor but it sure wouldn't hurt to have another opinion...just to be sure.
Also, fibromyalgia is not an inflammatory illness. Cortisone helps with inflammation so I would suspect that you are dealing with something else in your legs if they were helped that much.
Actually, I'm going through something like that right now. I've used ibuprofen for decades for my fibro but then developed an ulcer so I can't use that now. I'm now in a ton of pain. I have been seeing a rheumatologist and he said that ibuprofen should not have helped me like it has and now they are discovering that I not only have fibro but also another auto immune problem. So, I would suggest that you see a rheumatologist and be checked out. Fibro has many of the same symptoms as other illnesses and those have to be ruled out first.
Be sure to read Fibro 101...the second thread on the forum. There are links to good info about fibro and you will learn a lot there. Good starting links for you are called Symptoms, What Else Could It Be, and A Thorough Explanation of Fibromyalgia. See if you seem to fit in what you read. I'm just going by what you have written in this post.
Why don't you start your own thread and introduce yourself! When you come on the forum brand new, people can miss seeing that you are here if you just post on an existing thread. We have wonderful members that would love to help you.
I'm looking forward to getting to know you better. Let us know what you find out.
Sherrine