Lynn,
MCTD does include lupus, scleroderma and polymyositis by definition. Stress does trigger flares for many patients and it is best to avoid it if possible. Many patients have changed jobs or careers to reduce stress. One lady in our local support group changed jobs and it was like lifing a boulder off her shoulders....no flares.
I have MCTD and also post on www.myositis.org and www.myositissupportgroup.org. You will find others with MCTD or other overlapping connective tissue diseases.
Bill