Hello,

 

I'm really concerned because I have never felt it before.  It was a very sharp abdominal feeling and it was a surprising feeling.  It was in the upper quadrant, in the same side as my heart, and underneath my chest.  

It wasn't exactly pain.  Do you know the feeling you get when your foot is stuck in a position and if you move it any other way, it feels tingy and really uncomfortable and it lasts a few seconds?  It was somewhat like that.  Now when I sit up straight or arch my back backwards, there's uncomfortable pressure.

 

Did I pull an abdominal muscle?  I was just in my usual position using my laptop when this happened.