I Have A Very Deep Pain That Causes Me To

I have a very deep pain that causes me to lose sleep. I have Ankylosing Spondilitis and it may be related to this, but this is a very different kind of pain that feels deep within my bones and muscles and prevents me from sleeping. I also am continually stretching which helps the symptoms somewhat, but then I have the same painful feeling again. Then about 3 am, I finally fall asleep and wake up in the morning. The pain makes me twitch and is very annoying.