Long fingernails to bloody stumps

I’m never cutting baby nails again! I don’t care how much she scratches her face up with her own nails. I was cutting her nails while she was nursing but didn’t get them all, so I made another attempt when she was a little more fidgety. I should have known better. At first I though I cut her nail too short, but after her red-faced-screaming and crocodile tears subsided I saw that I had actually lopped off a tiny chunk of skin. Now I just feel like shit. I held her close, rocking back and forth, and almost produced my own crocodile tears. My poor baby is now sick with a snuffly nose and sporting an adult sided band-aid on her left thumb, which she promptly popped into her mouth.