I'm experiencing some discomfort and pain on the left side of my rib and chest area, especially when I take a deep breath. It also gets worse if I sleep on my left side. Should I be worried about this? What could be causing it?

It sounds like you might be experiencing muscle strain, inflammation, or possibly something related to your ribs or lungs. If the pain persists or worsens, it would be a good idea to consult a doctor to rule out any underlying issues like a rib injury or respiratory concerns.