oh you poor thing.
The middle of the night feeds can be the toughest cos you are so tired you just want them done. For me, it was these feeds when i got any damage until i started to really watch attachment to prevent any more. Soon bub will be big enough to do all the attachment stuff herself, but in the early days they get tired and forget too.
do you have anyone in real life that can have a look for you? A good mchn or gp?
Give the ABA a call, they might be able to work out what is happening, and give you some ideas and support. They are open 24 hours 1800 686 2 686.