I've been having this weird discomfort in my upper chest for the last few days, and it's starting to concern me a bit. Sometimes the pain even travels from my upper shoulder to my back shoulder. I can't help but wonder what could be causing this. Are there specific tests or checks I should be considering to figure out what's going on?

I would recommend you to get an ECG (Electrocardiogram) to check your heart's electrical activity, a chest X-ray to look for any abnormalities in the chest area, and possibly an upper endoscopy to examine the esophagus and stomach for any signs of acid reflux or inflammation. Additionally, blood tests may be done to check for any markers of heart damage or inflammation. It is important to consult with a healthcare professional for a proper evaluation and diagnosis.