Shincter of Oddi Dysfunction symptoms

I have had three upper GI scope procedures and two sphincterotomies since January 2008, the most recent was last Friday. I have never had the bad pain associated with S.O.D. but, instead, feel a pressure similar to late-term pregnancy--a baby's foot right under my right rib cage. I have been under a lot of stress in my life the past 4-5 years. I have noticed that any situation that I perceive as stressful causes the pressure feeling. I hope that the last sphincterotomy--10mm--following pressure readings will be successful. I am encouraged to read that many have tried acupuncture which I will also try.

My questions are: Has anyone noticed a correlation between symptoms and stress? I was also in a head-on auto accident in which I was trapped in my car. Is there any correlation between injury and S.O.D.?

Thank you very much for responding.