Sorry for you - i was just like this. Top tips are to lie your baby on the bed and dangle your boob down into her mouth, then smooth the tissue down towards your nipple as she feeds, so let gravity help dissolve the lumps. Then after each feed, get in the shower, get really soapy hands and massage evenly from the outside towards the nipple til they feel smooth and empty.
it's a phase which only lasts for a short time but it's important to keep on top of it. Good luck! Any sign of fever - get to your GP quick.