How long had you been sick before you saw the doctor?

Source: Tatoeba

If the pain continues you have to go to the doctor.

Source: Tatoeba

Did you go to the doctor?

Source: Tatoeba

I'd like to see a doctor.

Source: Tatoeba

Shall I go for the doctor?

Source: Tatoeba

You should see a doctor.

Source: Tatoeba

I think you should see a doctor.

Source: Tatoeba

I forgot to go and see the doctor yesterday.

Source: Tatoeba