YOU SAID:
Will probably have to go see the doctor
INTO JAPANESE
おそらく医者に診てもらう必要があるだろう
BACK INTO ENGLISH
You probably need to see a doctor
INTO JAPANESE
おそらく医者に診てもらう必要があるでしょう
BACK INTO ENGLISH
You probably need to see a doctor
That didn't even make that much sense in English.