Nice to meet you and I'm glad you found this forum! Txsilver gave you some excellent advice in your post "Is this arthritis?" A good rheumatologist would be able to help you figure this all out. No one here can tell you what it is just based off your symptoms. I myself wish it were that easy! I've been trying to get a diagnosis for over 4 years! The fact that there are over 100 types of arthritis can make it a difficult journey, as different types present with different symptoms.
Your best bet would be to find a good rheumatologist. They will not only look at x-rays and MRIs, but run the right blood tests to look for an answer. Once you have an answer, then you can start treatments. More often than not you will be more than capable of living your dreams.
Please come back and let us know how you decided to proceed. We will help you along to the best of our ability.
D.
Could it be Fibromyalgia?