I took the university entrance exam, but there is one week until the university announces their results.
I can't motivate myself because I feel that I'm sort of in mid-air until the university makes their announcement.
ご質問ありがとうございます。
"I took the university entrance exam,"＝「大学入試を受けた、」
"but there is one week until the university announces their results."＝「でも、大学が結果発表するまで一週間ある。」
"I can't motivate myself because I feel that I'm sort of in mid-air"＝「自分は何だか宙ぶらりんだと感じて、やる気が出せない」
"until the university makes their announcement."＝「大学が発表するまでは。」
ご参考までに。
アメリカ合衆国 
