Anyone else have fluctuating hunger?

Karla
I am 24.3, and the first trimester, I couldn't get enough to eat, and so far was where I gained the most weight (I think it was 8-9lbs). Second trimester, my appetite went way down, to where I was basically eating only because it was necessary, and I even lost a pound. I wasn't nauseous or anything, just not hungry. Now getting to third trimester, I am starting to feel hungry again, even at odd hours (it's 4:15am right now). Is it just me?