I'm in the same boat as well - especially at night when I go to lay down, and then cant sleep because I cant breath! I've had asthma all my life so I get kind of stresses when I cant breath (or 'think' I cant) - which just makes me worse! I've been seeing an osteo for back pain, and one of the things she also does is help me stretch out the diaphram and make more room for it and the baby...and it works!

Maybe seeing an osteo who is experienced in working with women who are pg might be helpful...good luck!

FG