I have just had an ultra sound on my upper abdomen, because of the same kind of pain. It is exactly the same thing you have been describing, a stabbing kind of pain, but mostly just uncomfortable.
My ultra sound came back, everything is fine.
On the 23rd I have an appointment with a gastroenterologist, my rheumy thinks it is something with my liver, since the liver enzymes have been high. I will let you know what he said.
It is very weird, that we have the exact kind of pain.