Weird Hunger

I've finally put two and two together and realized I have a strange appetite now that I'm pregnant. Sometimes I'm hungry in the morning, sometimes I'm not (but I make myself eat a delicious bagel every morning regardless); I'm ALWAYS STARVING at lunch -- I eat so much and still feel hungry (like right now); and at dinner time, food is the last thing I want. I'm not nauseous or anything at dinner time, but I just have no appetite. I wonder if that's normal. Then, I'll get hungry at like 9 or 10 when I'm laying in bed trying to fall asleep.