YOU SAID:

my leg is tired from the fall i took last week

INTO JAPANESE

先週降った秋から足が疲れている

BACK INTO ENGLISH

My feet have been tired since the fall that i fell last week.

INTO JAPANESE

先週落ちた秋から足が疲れている。

BACK INTO ENGLISH

My feet have been tired since the fall that fell last week.

INTO JAPANESE

先週落ちた秋以来、足は疲れている。

BACK INTO ENGLISH

My feet have been tired since the fall that fell last week.