I'm having this sharp pain in my chest, kind of in the middle but a little to the left, but it really only hits when I move my shoulder forward. Lately, I've also noticed this chest pain and feeling of unease when I'm lying down, though it seems to go away if I start walking or just stand up. I'm getting a bit worried. Could this be related to my heart or lungs?

It sounds like you may be experiencing musculoskeletal chest pain, especially since the pain worsens with shoulder movement. However, given your recent chest pain and uneasiness while lying down, it's important to rule out any heart or lung issues. I recommend you take an over-the-counter pain reliever like ibuprofen (e.g., Advil) for the musculoskeletal pain. If the chest pain persists or worsens, or if you experience any other concerning symptoms, please seek medical attention for further evaluation and possible imaging tests like an ECG or chest X-ray.