YOU SAID:
I can't believe I got a worse score on my math test
INTO JAPANESE
数学のテストでスコアが悪くなったなんて信じられません
BACK INTO ENGLISH
I can't believe my score got worse on the math test
INTO JAPANESE
数学のテストでスコアが悪くなったなんて信じられない
BACK INTO ENGLISH
I can't believe my score got worse on the math test
You've done this before, haven't you.