Hey Alex, sounds like you're doing an amazing job! A few things worth knowing. ..
A) it takes a good few weeks for babies to respond to day/night - but part of the reason will be:
B) babies suck a lot around day 3-4 to place their milk supply order and get your milk in. It has very little to do with actual hunger. One midwife told me the near-constant feeding (plus lots of spit-up) is also designed to help prevent mastitis.
They feed/suck more at night because the hormone prolactin which makes breastmilk is much more active at night. This is difficult for mums but is actually a clever production tool.
C) All of this hurts :( I remember that horrible toe-curling pain. It does get better though - I don't think I used lansinoh after first week (apart from during a growth spurt)) - and now I sometimes have to check if H is even latched on.
D) Sounds like a blood blister , may be that her latch isn't quite ideal - it's really hard for newborns to successfully navigate the small mouth-big nipple problem. I'd give a support line or mw a call tbh - they'd be happy to help check the latch and offer encouragement.
Oops - epic again
keep going tho - the first 2 weeks of breastfeeding are the toughest. It does get easier!