Anyone else feeling starving all the time so early as nearly 7 weeks?

So I have had barely any symptoms. Sore back and hip last wk. Nothin this wk apart from a bit of tiredness. I have fairly fast metabolism and am very slim. I feel starved. Need to eat every 2 hours at least. Otherwise I feel sick. No nausea or any other symptoms at all. Is this a normal symtom so early or am i being greedy? In a normal non pregnant state i eat a lot too frequently but not to this extent. This is just annoying.