Lupus & Rheumatoid Arthritis and Diabetes all 3 at once

Hi,  I am new to this site & I am in need of help.  I have been diagnosed with 1st, Diabetes type 2,  then doc. did more blood tests & exams & Rhuematoid Arthritis was diagnosed,  after 2 months he told me I have Lupus  --  Mixed connective tissue disorder.   I am now chair bound & full of pain, Fatigue,  and Depression   I am 64 years old with a lot of life to go.  does anyone else have this combo??  I am on lots of meds now but pain & fatigue are worst.  Diabetes 2 Is under control with Ac1 at 6 right now.