Breast pain?

I have pain in my right breast. It's always there but I have moments when it's more intense. 
It doesn't seem to be a blocked duct as I can't feel any lumps. 
It almost feels like deep inside my breast is bruised. 
It's worse when I'm cold and laying down. 
Sometimes it radiates through and the back of my shoulder hurts too. 
I have a doctors appointment in 2 days but I'm hoping for advice sooner.