Hungry all the time, but then not?

🌻🌺Trinkster🌺🌻 • Mamma to my little man 10/02/18 and little girl 11/29/19

I'm about 5 weeks right now, and all I want to do is eat. but Every time I get the food, I lose my appetite right away. It's not due to nausea either. I just want to know if this is normal. Always wanting to eat, but taking 2 bites and being done.