this is my third pregnancy, I' have two daughter and when I was pregnant with them I pretty much felt exactly the same.. Nausea, vomiting, fatigue etc. but with this pregnancy, I had some slight nausea in the beginning but by 12 weeks I had nothing. I actually don't even feel pregnant at all. Other than these headaches. They are horrible. Have any of you ladies experienced headaches like this during pregnacy? If so do you know what causes them?