פירוש על ישעיהו 21:3

my loins are filled with trembling The prophet is merciful and sighs over the retribution meted out to the nations. This is the Midrash Aggadah (Tan., beginning of Balak). According to its simple meaning, however, the prophet is reciting the lamentation and the mourning as though this were Babylonia lamenting. pangs (צִירִים), an expression denoting trembling and pains. And our Rabbis said: A woman has doors and hinges (צִירִים) on her womb just as the doors of a house have hinges (Bechoroth 45a).

Therefore. Because I heard the cry, Go up, O Elam, I neither heard nor saw anything on account of my great fear.

I became confused This is a malady known as עֲוִית, convulsions, in the language of the Sages.