Hello, I went to the emergency room 2 days ago due to heart palpitations and dry throat and mouth. The dr diagnosed me with strep throat and im taking penicillin. My throat seems better but im not sure about the palpitations. They performed an EKG and said it was normal rythm just a little fast as if i had an energy drink. I do have symptoms of anxiety but have never been diagnosed. Today i felt as if my heart was beating really fast and now have pain in my left shoulder blade that i feel right under my collar bone. More like a sore feeling. I m just terrified something is wrong. I have a history of gallstones which i did not have surgery to remove