I can't deal with these things

Griggs smashed two of his fingers at the union station looking at the trains a couple weeks ago. Can I say saddest thing ever!! Im not good at staying calm when my baby is hurting. I know that is bad but it just breaks your heart. Well he is ok now but i just can't even look at his fingers now cause the fingernails are FALLING OFF! So sick, his ring fingernail is just hanging--wth do i do? My dad told me just to let it come off naturally but im not sure i can deal with this any longer..