What could cause this pain?

I’m having horrible pain below my collarbone in the location I circled in the picture below.

I haven’t done anything that would cause an injury. It hurts when I breathe deep, move my arms, stand up straight, or honestly even when I’m just sitting there.

Do you know what could cause pain in this location? Curious what feedback I get before deciding what kind of doctor I should go to get it checked out.