I am sorry you are having such a rough time right now. I feel really terrible about that. I am concerned though that you are identifying so strongly with MS. I know you did some research and you see some symptoms you relate to but you have some symptoms that are really not very MS ish as well. The extreme joint cracking you have mentioned is not something that seems like MS. The pain that travels from spot to spot is unusual too. My pain is related to a lesion on my spine and that pain is pretty much in the same place when I am experiencing it.
It is really rare for a clean MRI to still mean MS. I wish so much you could feel good about that. I am afraid that if you obsess about MS, you are going to overlook something that could be quickly or easily treated.
I have seen that you have posted on other forums here at HW. In one of those, you mentioned that perhaps you were spending too much time on MS, ALS and other sites. You have a good head on your shoulders. You see that your time on the internet my be causing even more stress and anxiety.
I am so glad to hear that your baclofen pump is working. That is such good news and offers such hope to others. Thanks for posting.