This is what causes menstrual cramps. Then after 14 days, the hormonal level changes to prepare for the release of the next egg. The hormone levels of both estrogen and progesterone keep rising till about 4 days before the next period, and then, if fertilization has not taken place, they fall.
Daisy is the woman that Gatsby loves. She is nicks cousin and is married to Tom. When she was younger her and Gatsby were in love but Gatsby was not wealthy.
Later, Nick will host the climax of the novel: Daisy's date with Gatsby. He is complicit in Gatsby's seduction and adultery, so his moral standards are no better than Tom's, really. At the end, Nick will denounce the Buchanans, especially after they leave a mess to be cleaned up in Myrtle's death.