King James Version (KJV)
My heart panted, fearfulness affrighted me: the night of my pleasure hath he turned into fear unto me. {heart...: or, mind wandered} {turned: Heb. put}
Modern English
My heart flutters. Horror has frightened me. The twilight that I desired has been turned into trembling for me.
Hebrew
תָּעָ֣ה לְבָבִ֔י פַּלָּצ֖וּת בִּֽעֲתָ֑תְנִי אֵ֚ת נֶ֣שֶׁף חִשְׁקִ֔י שָׂ֥ם לִ֖י לַחֲרָדָֽה׃
taʿah lbabiy palaṣvt biʿatatniy ʾet neshef ḥishqiy sham liy laḥaradah