My cockatiel laid an egg two days in a row.

[UzBot]

My cockatiel starting laying eggs 6 days ago and laid her first egg on June 1st. She has 4 eggs now. She laid one yesterday and when I returned from school I found she had laid another today. Is this concerning?

 

[Zara]

Normal.
Eggs are laid 24-48 hours apart

concerning

Things to look out for are mishapen eggs, small eggs, thin shelled eggs, - basically anything odd about the egg.
And also watch your hen for signs of lethargy, vomiting, loss of apetite, loss of flight..