Dealing with Lupus and Tendinitis: Strange Pain in Elbow and Leg

I was diagnosed with tendinitis a little before Lupus diagnosis. Today that same weird feeling/ pain from my elbow to my hand came back. I personally think it’s more nerve related. Also I experienced that severe leg pain I experience before lupus diagnosis. It came out of no where, I almost cried. It lasted a little under an hour tho. I’m just wondering what’s going on. I seriously had flash backs from that leg pain. I remember how confused I was when I first started experiencing those joint pains and I had no idea what was going on with me.