My sympathies. I was in your position several years ago. Other than taking the painkillers there isn’t a lot you can do. I thought of it like severe internal bruising, as that’s the way the constant pain felt. That takes a good six weeks to heal.
My only advice is to try and keep warm, ‘support’ your chest (I wore tighter t shirts and vests under my normal clothes), gentle movement and no weight lifting. Hard to do when needing to clean/shop/work etc.
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