Hi abizmum
Congratulations on the birth of your daughter, it's great to have them finally with you isn't it.
Just want to chime in too, although the others are much more experienced and have given some great words of wisdom. But wanted to let you know that there are others out there going through it too who can help, if only by letting you know you are not alone.
My son is 3 weeks old, and I remember day 5 and the time around it as being really hard. The midwife came round that day and helped me loads with my latch, but I really struggled with feeding and I cried every day. I felt like such a failure as he was losing weight and I couldn't feed him well enough due to the permanent engorgement and how tired I felt.
It does pass, I am certainly not saying that at 3 weeks it is easy peasy - quite the opposite. I'm still learning and finding things harder than I ever imagined, but compared to 2 weeks ago, I have seen such a massive improvement in my mood (ok so I cry every couple of days), and the way that I am able to feed my son. I am hoping that this improvement will continue and that there will be a day very soon where I don't think at least once "I'm not sure I can do this" and it will be more like "wow, it's working".
Hang in there, and read as many threads as you can on bfing. It is really encouraging to see other people have gone through the same things as you, and that things do get better, and the advice is so helpful if you are unable to speak with anyone close to you or at home.
If you do decide that you can't continue bfing, remember that you have given it a try, so don't beat yourself up about not being able to continue as you have already given your daughter the best possible start for her first week.
Good luck with the feeding, and ask for help wherever you can get it, as that's what the midwives and the breast feeding counsellors are there for, and it can make a huge difference.