[MacMattico]

It is right below the rib cage on the left side. It is mostly dull like what I had with my gall bladder, but will then seemingly out of the blue feel like I’m being stabbed over and over. Then go back to dull.

[LukeL]

Look up Tietze Syndrome and Costochondritis.

[The Cajun]

In very rare circumstances, you can have gall stones even though you've had your gall bladder removed.

I was kind of shocked to read about this since I've had my gall bladder removed 20 years ago.

Besides the point, they should have never sent you home without doing further test to determine the problem.