As I understand it, a gallbladder sonogram will only show if there's actual gallstones, not for non-gallstone gallbladder disease.
The CCK HIDA (pipida) nuclear medicine scan is what generally shows gallbladder disease even in the absense of gallstones.
From those symptoms, I'd say that test is definitely called for. If I were you, I'd ask your physician about it.
And I wound up at this forum because I suspect I have adhesions, because I was suspected of having gallbladder disease, but my CCK HIDA scan said my gallbladder is functioning normally.
But on an old message in this forum, I found a post by someone who said their CCK HIDA scan was normal, but when the surgeon went in, he found an inflamed gallbladder covered with "scar tissue".
Interestingly, that's what adhesions are - scar tissue.
You haven't had any past surgeries have you? The reason it's likely I have adhesions is that they're predominantly a problem from gyncological surgery, and I did have that.
The reason I felt the need to post here about that is that your symptoms sound an awful lot like my own.
My first family practice doctor kept telling me I had the flu, week after week.
I've now been in pain and sick every day, non-functional, since February (it's now the end of April).
That's not a bug!