Hello,
I am not sure what the problem could be? I have heard of people having hip bursitis with your type of pain, or even pain from sciatica can cause hip pain, which I have, but typically, in order to be diagnosed with Fibromyalgia, you need to have pain in at least 11 of the 18 tender point identified by Rheumatologist for diagnostic purposes.
Have you been seen by a Rheumatologist? They would be the doctor best fit to diagnose Fibromyalgia. I have posted a link here from our website (MedHelp) of the common symptoms of Fibromyalgia. You can find this in the Health Topics tab at the top of the page too.
http://www.medhelp.org/medical-information/show/124/Fibromyalgia?page=1#sec_262