Welcome to NT!

It's a disorder that relies on the process of elimination; thus it takes time to figure out what exactly causes these weird symptoms. It could be fibromyalgia, or pinched nerves, any number of things. Keep a symptom journal. Eat right, get some exercise, and some rest too.
It can be so frustrating not knowing what is going on, I know.. most of all, though, try to live life to the fullest and not let your symptoms get in the way of doing that.