Just before Christmas, I had an episode where I had severe pain in my upper right back that radiated down my right arm and ended in tingling and numbness in my right hand. I had a series of tests that ran to pain in my upper right abdomen that resulted in a diagnosis of overactive gallbladder. Just a few days ago, I had an episode where I had severe pain in the sternum area, dizziness, nausea and sweaty palms. I passed in about 15 minutes. I m now wondering if the overactive gallbladder is just a minor annoyance and there could be something more serious going on. Thoughts?