I woke up with an ache in my left rib cage and on my left collar bone as well, still remaining. No pain or irregularities in the breast. Help?

The reason is not obvious with what you have said.

There might be more to the story as there is not enough history provided Are you an athlete. Have you been in any trauma. ? The likelihood of a heart issue is small. If this persist however see your doctor tomorrow. Would you like to video or text chat with me?