Rebekah is exaggerating to emphasize how upset she is about the Hittite women that Esau married. This could be translated as "I am terribly upset." (See: [[rc://en/ta/man/translate/figs-hyperbole]])
Rebekah uses a question to emphasize how upset she would be if Jacob marries a Hittite woman. This could be translated as a statement: "My life will be awful!"(See: [[rc://en/ta/man/translate/figs-rquestion]])