YOU SAID:

i am in a great amount of pain

INTO JAPANESE

私は非常に痛い

BACK INTO ENGLISH

I'm in a lot of pain.

INTO JAPANESE

私はとても苦しんでいます。

BACK INTO ENGLISH

I'm in so much pain.

INTO JAPANESE

私はとても苦しんでいます。

BACK INTO ENGLISH

I'm in so much pain.