Feeling absolutely ravenous 24/7

Ever since becoming pregnant, I have had an absolutely insatiable hunger. I'm only 7 weeks and I'm so scared it's going to get worse. All I think about is eating. I dream about food. I definitely do think I eat enough, I eat much more than before, but I'm so sick and tired of feeling like I'm on the brink of starvation 24/7. Oddly I have almost no nausea/morning sickness, my only other symptoms are exhaustion and very tender breasts. Is this normal? Does anyone else deal with this?