Please don't be too rough on yourself. It happens to the best of us.
Last year I had 5 eggs in my little
Brinsea. Earlier I had added a manual turning unit to it and it was the first time I had tried it out. When I put the eggs into lockdown, all 5 were viable. I wanted to move the incubator to our bathroom where I could close the door and our cats would leave them alone. Imagine my horror when the lid came flying off the incubator and 4 of the eggs either landed on the floor or on the table where the incubator had been sitting.
One egg 'died' in my hand horribly shattered, blood dripping between my fingers. 3 others were badly fractured but not bleeding or oozing. One somehow escaped damage. I was sobbing but pulled myself together and went to work. I cleaned the eggs and spackled them together with paraffin. 3 of the 4 showed movement. The other egg developed a blood ring the next day and I pulled it from the incubator and held my breath. The next day all three of the remaining eggs hatched healthy undamaged chicks that are now a year old. I call them my miracle chicks.
Turned out the manual turner unit had a 'burr' on it that kept the lid from engaging the flange that kept it in place. I've been doing this for over 6 years now so it happens.
We learn from our experiences when dealing with chickens. In the perfect world mistakes don't happen but this world isn't perfect.
Take a deep breath, forgive yourself, learn from this experience and wait to see what happens. The little one has suffered blood loss. If it is strong enough, it will survive. Handle it as little as possible so the egg yolk sack isn't damaged. When it does absorb I personally would try to get a few drops of nutri drench or chick saver down it along with a little sugar water to replace the lost fluid from blood loss. It's a waiting game now.
I'll be saying a prayer for you and your little chick if you don't mind. And keeping all my fingers crossed.