Bad upper back pain. Help please

I've been on Oxypowder cleanse 3 days so far, been feeling great, until I woke up this morning. I woke up to bad pain in my upper right back/right shoulder blade. Thought it might pass, but it has gotten worse. The pain has now extended downward to mid right back. Pain is still mostly concentrated in upper right back/right shoulder blade. I was wondering if this has to do with my gallbladder. Is it a sign of gallstones?

This is my first cleanse. I'm a little scared, I don't know what to do. I hope I'm not doing more damage than good Tweet