YOU SAID:

i was suffering more than i let on

INTO JAPANESE

私は許す以上に苦しんでいました

BACK INTO ENGLISH

I suffered more than I could forgive

INTO JAPANESE

許せる以上に苦しんだ

BACK INTO ENGLISH

I suffered more than I could bear

INTO JAPANESE

耐えられないほど苦しんだ

BACK INTO ENGLISH

suffered unbearably

INTO JAPANESE

耐え難いほど苦しんだ

BACK INTO ENGLISH

suffered unbearably