My husband tore his peck last year and a minor tear this year. I would recommend going and seeing an ortho and have it looked at. I would NOT workout because depending on the tear and the location you can comletely tear the muscle and it might not be repairable, give it time to heal.
When you tear your chest you don't always seen the bruise on the chest you can see it on the inside of your bicep. I wish you well.
You know just as well as anyone the wonders of protein. Up your intake and don't use the muscle give it a chance to heal. I was gonna wait for some sort of PA or MD to respond before I said anything but It looks like you've been waiting a while. I'm sure you've already tried this - good luck.