Yes Right Now I Am Dealing With Some Complicated Disease

Yes right now I am dealing with some complicated disease issues. Overlaping diseases, and I want to know precisely what is wrong so I can begin treatment ,and or treatments...We can't discuss all, but I have had HCV all my life, I am now 61 and beating all odds I am still here. Unfortunately I was an idiot who did the combo treatment for HCV genotype1b and I lasted for 3 months before I stopped treatment. My main question is How do I distinguish lupus ,from parkinsons, from MS for I am having symptoms of all these. I have been diagnosed with fibromyalgia. What extra blood , or nerve tests shold I begin with.?