Ive been the same too! When I was 5-6.5 weeks I was starving all the time and always eating. I had been going to the gym twice a day 5 days a week and put on 1.7kg. When I hit 7 weeks I wasnt so hungry but have been feeling a little queezy no vomiting just not 100% normal and Im not so hungry anymore.
I tend to find that vegemite on toast and jasmin tea helps it go away. Im 8 weeks tomorrow.