So I'm just now experiencing the nausea at about 4.5 weeks pregnant. Today has been hell!!!!!!! It's been almost all day, none stop. I can't eat, I'm shaky, my face gets really hot while my body is cold. Now I know why they say being pregnant feels like the flu. Please help?! I need something to help the nausea and also, how much is too much where I should call the doctor?