Huh?

Angry like a pregnant woman? I don't recall being particularly angry. Tired, maybe. Nauseated occasionally. But, angry?

Berachot 29b:
R. JOSHUA SAYS: HE WHO IS WALKING IN A DANGEROUS PLACE SAYS A SHORT PRAYER. . . IN EVERY TIME OF CRISIS. What is ‘TIME OF CRISIS’ [‘ibbur]? R. Hisda said in the name of Mar ‘Ukba: Even at the time when Thou art filled with wrath [‘ebrah] against them like a pregnant woman, may all their need not be overlooked by Thee.

More sensibly:
Said Elijah to Rab Judah the brother of R. Sala the Pious: Do not become angry and you will not sin (Rashi notes: Don't become angry becasue through anger you will come to sin), do not drink excessively and you will not sin; and when you go forth on a journey, seek counsel of your Maker and go forth.