Worry wart or what? LOL...
As she requires more, she will continue to nurse for longer periods as your supply adjusts. It's amazing, but your body will just seem to "know" that she needs more and adjust accordingly. It usually only takes a day or so for it to adjust. Even with strictly pumping it seems my body just knows when it needs to produce a little more each time.
Hey there hunny, It's a long hard road breastfeeding isn't it, but THE most rewarding thing I ever persued ever, I started BF my little girl at almost 10 weeks old, she was 10 weeks premature and was in the hospital for nine, so I expressed by hand and pump, one night she was still hungry after her bottle so I though why not lets see what she does and she latched on. I got an immense amount of help from my local breasfeeding helpline and group, they are a relative ocean of information and they are all or were beastfeeding mothers themselves, she got it after a day of trying and went on till she was 10 and a half months (teeth!) Your baby may have bad cholic and if she does it's most likely painful, and therefore the extra feeding could well be a comfort thing, and even without pain they like the comfort of being that close to mommy! I would suggest however that it could also be reflux, because as I am led to believe BF babies aren't usually all that windy, there's no air in your breasts right? that's as best I can figure why. Anyway, Just watch out she doesn't have a lazy latch, it wont hurt you but if the seal is not formed between breast and baby she may get air in that way. This was long winded....sorry hun, I hope it helped a little, and I suggest again, seek out your local breastfeeding group or helpline they are fabulous! good luck and all the best and well done you for being such a great mum and putting up with very little sleep! hugs x :)
Your supply will adjust if she needs more. Some babies are really big on comfort nursing (I know mine is and stays latched if I let her for hours) but if it is reflux then she will also nurse to help the pain.