OH YEAH...absolutly. Stress has always thrown my moods and I always wondered why.....when I got diagnosed it made so much darn sense!!! If I had heavy stress I would have, at the time, hypomania to get it all done and then crash into a low spell. When I started working a high stress retail job around the holidays, on top of attending college full time it went BAM, into full mania and that is how they found out I was not un-polar but bipolar!
Good question - you might want to post this to Dr, Gould, the Medical Expert in the Mental Health Forum, too.