A resposta do OP foi removida da pergunta (e editada para corrigir possíveis problemas):
So, I fixed the problem.
First press Ctrl+Alt+F1 and log in with your username and password.
Then you will need to remove the old driver:
sudo apt-get purge ^nvidia-
After that you will need to add the graphics-driver PPA
sudo add-apt-repository ppa:graphics-drivers
and then
sudo apt-get update
Search for the latest Nvidia drivers for your hardware here on the Nvidia site.
In my case I used
sudo apt-get install nvidia-384
And done, just reboot and you should be ready to go.