How do you recover after knockdown in sparring

Long story short got paired up with 60kg heavier beginner(chubby guy), after lots of light jabs from me he lost a temper and “accidentally” thrown a strong right hook. Haven’t seen it, just heard my neck crack and found myself on my knees a second later. Assume I turned off for half a sec or smth. Coach stopped us immediately and finished sparring session for me.

How long are you usually staying off training and off sparring after that? No sickness, just a slight headache for 2 days and a feeling of hangover. All information I can find on the internet is about knockouts only. Obviously therapist will say “just don’t do boxing at all”