I am an 18 year old female. In November 2017 I was sitting in class and started having sharp chest pains on my left side. The sharp pain came and went and lasted sometimes just a few seconds or minutes to several minutes and this went on for several days. The first day I started having chest pain was on a Friday and it was so intense I went to the ER. All they did was an x-ray, gave me a tylenol and sent me home. The following Monday I went to my local doctor's office and was told it sounds like I have Costochondritis and they did blood-work but everything came back normal. I started taking an anti-inflammatory but it didn't seem like it was helping much. After a few weeks I wasn't having any pain. In January I started having the same type of pain so I started taking an anti-inflammatory again but it wasn't helping so I went back to doctor. At that point the pain was again off and on and lasted for a few seconds or minutes but it was on both sides of my chest, down the middle of my chest, and in my ribs. I had an ultrasound done to check my gallbladder and more blood-work done but doctors said my gallbladder and kidneys looked fine. The pain is still off and on and more intense at times. Sometimes the pain goes into my arms and shoulders. Is this something I should ignore and see how it goes or see a doctor again? Could it still be costochondritis?