I just want to eat!!

Every time I eat, I get so sick to my stomach. Ive only thrown up a couple times but I'm constantly hungry and nauseous. I've tried ginger ale, crackers, icee's, you name it. I just want to eat!!! I was so happy last week I was saying I didn't feel pregnant at all, and BAM! I hit 6 weeks and now it's in full force. I work 40-50 hours a week and I'm just exhausted.... all I do is sleep on my day off. I'm just so over being tired!