I am sure you will come back to many posts about how we have all done a similar thing.
When DD was a few weeks old DS1 was rushed to hospital with a suspected fractured skull having fallen off the kitchen counter, aged 2.
When DD was 9 months old she felt off the changing table. Both these accidents were when I turned away to sneeze.
When DS2 was 3 weeks old, 22 month old DD had to be blue lighted to hospital when she fell on to the buggy and had a serious injury.
We are not having any more babies.
It happens to most of us.
He will be fine. You will be fine when you have got him checked out and have got over the shock. Don't feel the need to tell T. He will only use it against you.
C will be okay. Don't worry.