Wow - your description sounds just like cracked ribs! So painful! It's possible you've bruised the cartilage of your ribs... that also hurts.
I think one thing to consider is that the impants are actually UNDER your muscle. Before, you had a breast cushoning your muscles... Now, your muscle is right there ... Muscle bruises can really hurt...
As someone who has busted ribs and so on through bike racing, it does take time. When I busted ribs, laughing hurt for like a full month and so on.... So, I would say that if it doesn't ease up by the end of another week going by, then another call to your breast surgeon for sure! If you're worried, giving a call to your pcp might be in order.
Sorry you fell and it hurts so darn much!