I'm sorry to hear how bad your symptoms are. That is terrible to go through.
Calcium and magnesium can help with muscle cramps. I started taking a supplement of these recently because I started having cramping in my feet and charlie horses that would wake me in the middle of the night in pain. As long as I take them, I have no cramps.
I also take omega 3 oil every day which has reduced muscle and joint pain considerably. This took a few months to really notice a difference in the beginning, but I know it's making a difference because if I run out for a week or so the pain starts to return, and when I get more, within a week or so it decreases again.
There may be some other things you can try as well. These are what come to mind at the moment.