Estrogen rises: As your Week 1 goes on, you become more willing to put up with minor annoyances–like a chair that’s a bit too hard or a faucet that drips loudly–than you did in your premenstrual Week 4. Credit for your flexibility goes to rising estrogen, which makes you more patient and upbeat, so you’re less bothered by small problems. Find out more by downloading the Hormone Horoscope App.