no nausea?

Devin
I'm 6 weeks today and have yet to feel any nausea. Omg symptoms I've had is sore breasts, especially my nipples and occasional mild cramping, and constant thirst and need to pee. All manageable though.  I hate feeling worried, any reassurance from other ladies? This is my frist pregnancy after TTC for a year and a half. 
When did nausea start for you? How many of you didn't have it at all and had a healthy baby?