My two year old knocked heads with my newborn

I’m over thinking all the terrible possibilities on what it could’ve done to my newborn.

I’m freaking myself out. Please give me suggestions on what to do.

I was feeding my week old and the top of her head was facing my 2 year old. She got in trouble and flew her head back and it hit my baby’s head. She cried for a few seconds and then stopped.

She’s now asleep on my chest. But I’m overthinking. What should I do??