just make sure that you get on top of it babe...i have had that and it can turn into mastitis pretty quickly. i recommend feeding from the breast (as you are doing) and helping the block out (which it sounds like there might be still) by gently massaging down while DD2 is feeding. also, AFTER a feed grab a bag of frozen peas or some ice-pack and whack it on ya boobs.

my LC told me that if DD sleeps through like that again and i can feel the engorgment that it is a good idea to get up and gently express off a little bit to just relieve the pressure and help prevent lumps...(which can feel like lumps or like the bruising that you have mentioned).