Hi Mummy Kokura,
Your baby seems to be going through growth spurt. You are right, she only sucks for comfort most of the time during this period. Just hang in there as that, too, shall pass. You may try to apply breastmilk to your nipple if it's already wounded/sore and let it air dry. that's what i did with mine. I alternate my other breast for the mean time.
By the way, good job for breastfeeding your daughter!