how com so many threads on committing suicide? 
This is bad...hey people, treasure your life! Dont waste your life
away like this...
btw, your symptons might be a result of just psychological effect
if you said that doctors cannot detect what is wrong with you. When
people feel -ve, they have an "imaginery" discomfort, pain,
uneasiness in them which they feel like exploding..
The more you try to assess whats wrong with you, but cant find any
illness, the more depress you get.
You may like to sit down, mediate and relax in a quiet place, and
think of incidents that had happen lately which affected you?
Sometimes, if you dont think of the pain, it will just disappear
away...
However, maybe like one of the forumer mentioned, you can see a
chinese physican first..Well, if the pain/discomfort pesists, go
see another western doctor again, tell him/her the problem, and say
its affecting your well-being, moods, etc..he will understand what
you mean..
get well soon!