I am so sorry to hear about Toby. At that age a fall that high could be very serious, especially such a small breed. There are some cases that I feel can be worked out over the internet and then there are more traumatic cases that I feel need to be examined and evaluated.
In this situation, I would definitely encourage you to have the puppy examined by a veterinarian to ensure that there is not evidence of internal bleeding, shock, head trauma, broken bones,etc.
One important thing that you can do at home is to monitor breathing and evaluate gum color. Toby should have nice pink gums, if they are anything other than pink, there is reason for concern. You also need to really minimize handling. Keep him very quiet. You also want to monitor for responsiveness. He should be responsive to you and not too lethargic and withdrawn. Another reason for concern.
Do you have a veterinarian close to you that is open?
What are his symptoms currently?
Please let me now if you have further questions. I hope that you are able to have him checked out.
I am so sorry that this happened.
Keep me posted, please.