speak too soon

US /spiːk tuː suːn/
UK /spiːk tuː suːn/
"speak too soon" picture
1.

falar muito cedo, cantar vitória antes da hora

to say something that turns out to be wrong very soon after you have said it

:
I thought I had finished all my work, but I guess I spoke too soon.
Pensei que tinha terminado todo o meu trabalho, mas acho que falei muito cedo.
The baby finally fell asleep. Oh, wait, I spoke too soon, he's crying again.
O bebê finalmente adormeceu. Ah, espere, falei muito cedo, ele está chorando de novo.