Appetite?

I'm 22 weeks pregnant, will be 23 on Saturday and my appetite is a lot smaller than what it was when I wasnt pregnant. I thought your suppose to get more hungry whole pregnant? I went to long horn yesterday with my fiancé for dinner ate 3 bites of stake, and some mashed patatoes and was completely full! I eat breakfest and lunch but not anything big because I'm not hungry like I use to be. Is this normal lol?