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When I saw your reply, it was interesting for me. 공황 gives me negative feeling much.
Sorry. I can't find replace the other word.
If I were you, I'd like to use '아찔하다' ( past tense : 아찔했다 )

Oh!thanks a lot for correct me. :)

대화할때 뒤에 ‘였어요’처럼 존댓말 연습을 해야 할 것 같아요. 저는 매우 공황 상태였어요. 이런식으로.

Great! Thanks a lot!