Depression!!

Hello All, it has been a very very long time since i came to this site, but i find myself right back at square one from 2-3 years ago, while i was never diagnosed with lupus all the signs pointed there, i.e positive ana, and other bloods pointed to connective tissue disorder, while one doctor felt very strongly that it was Lupus, my Rheumy felt the titre's were not high enough for her to say outright that was my problem, i have never felt well since then have had numerous "flares" since then, but i find myself with what i call a flare again that is the worst and most debillitating i have so far encountered.
I can barely move with the pain of inflamed joint's and muscle pain's, i have a rash that appears and disapperars randomly, it appears to be staying at longer and longer interval's, starting on my face and travelling to my neck upper chest and onto my arms, while it does not itch it defineately has a kind of burning feeling to it, i can stand in front of a mirror and watch it appear as i feel it coming on.
I do have a doctors appointment in the morning, but my main question here woild be, i know i am suffering with really bad depression, and have been for month's now, but can depression atually cause a flare, is what i am questioning?
Thankyou for taking the time to read this, just looking to hear anyone else's comments on the link between this,

Please be well, and take very good care of yourselves x