Early pregnancy symptoms?

What are some early pregnancy symptoms you've noticed before your missed period? 
​I can't tell if my pcos is driving me batty the past two weeks (worst pms ever) or if it's early pregnancy. 
​-excessively heavy breasts for over 7 days
​-mood swings including a lot of anger (unusual) and anxiety
​-strange dreams, disturbed sleep
​Etc
​Anyone?