I Have Had Migraines For 40 Years. Extreme Anxiety For

I have had migraines for 40 years. extreme anxiety for 30 years. cervical cancer, now added to that i have been diagnosed with fybromyalgia, chronic fatigue, seronegative polyarthritis. recently had blood work showing ebv (300), parvo. i have severe back pain, elbows etc.....just wondering if this one thing can explain all these separate diagnosis? or are there some other tests i should ask for to help find out what is going on?