Welcome to WHL.
First let me tell you, how sorry I am about your misscarriages.
From what I have read from your post, it does sound like you have Lupus, but to be sure, you have to see a rheumatologist asap.
As for the pain, I too have back pain and neck pain every day, besides the muscle and joint pain.
So you see, you have come to the right place, because we all know how you feel.
I may have been dealt a bad hand, but at least I'm still playing with a full deck. ( most of the time anyway).