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.
At the party Daisy seems to be very distasted with the events. This of course puts Gatsby down since in a way those parties had always been for Daisy. Gatsby had always thrown these parties in hope that maybe some day Daisy would waltz in. What Gatsby most wants is to impress Daisy, he wants her to want him.