Pain under rib cage on right side?

I have been having pain on my right side under my ribcage for a little over 2 years now. It started when I was pregnant with my daughter (she just turned 2). The pain started at about 16 weeks or so.. I did have gallstones and had my gallbladder removed a little over a year ago. The pain is still just as bad as it was and I'm starting to become concerned. I am not sure what it could be, but I sure am sick and tired of it. It is soo painful! Has anyone else experienced this? OR does anyone know what it could be?!?