慌 (Kanji for be in a rush / freaked out)

Onyomi

KOU

Your sister took so much COCAINE that she freaked out and her heart went wild.

( が ) あわ＊てる

to be in a rush (or busy) to the point where you freak out; to panic KANA
★☆☆☆☆

大慌てで(おおあわてで) xxxx

helter-skelter ☆☆☆☆☆ KANA
大 (big) + 慌 (be in a rush / freaked out) = 大慌てで (helter-skelter)

To do XXX in a panicked rush, helter-skelter!!!!