I've been having this pain on the left side of my chest for the past 8 months, since September. I've already done ECG, Echo, TMT, and various blood tests but everything came back normal. The pain comes and goes, but in the last few days, it's been bothering me again. On top of that, I'm experiencing body pain too. What could be causing this? Should I be worried?

It sounds like you have been experiencing left side chest pain for quite some time, despite normal results from various tests. Since the pain has started again recently and you are also experiencing body pain, it may be helpful to try a medication like Acetaminophen (Tylenol) 500mg for pain relief. You can take 1-2 tablets every 4-6 hours as needed for chest and body pain. However, if the pain persists or worsens, it is important to follow up with your healthcare provider for further evaluation.