Hey one other thing...I swear by this cream.....LANISOH. You can buy it the world over from what I understand...generally at your pharmacy/chemist..whatever you call them in America:)
After every feed put it on your nipples...you don't have to wash it off when you go for the next feed...but this stuff really does help when you are experiencing sore nipples. Trust me, it is worth its weight in gold!!!
I am not the breastfeeding specialist on this forum...and they might have some other ideas...but you know how you were saying that you had blisters...are they white?? Like a milk plug ie the milk isn't coming out of the duct, it is blocked...cause if they are white what you can do is when you are in the shower get your nail and scrape the white plug so that it unblocks ...then what you do is while the warm water is running over your breast you actually milk your breast a bit so that is clears the blockage, you want to see milk coming out of that milk plug..that means you are clearing it. So everytime that you noticed that white blister coming back...when you are in the shower you can start unblocking it by following those procedures...after a while it will go away...and you wont have that incredible pain when they latch on. Obviously, if you have got a clear sort of blister then don't do what I have said...because that is totally different. A clear blister is on the surface of the breast thereby affecting the external part of the nipple...a white blister is a blocked milk duct effectively and you can give yourself quite a bit of relief by doing what I suggested.
HTH and you can continue on to some pain free breastfeeding.