Yes, you always show faster with your second pregnancy.
If you are hungry, you SHOULD eat!! Just keep buying healthy things so those are your only options. And if you're craving unhealthy things, think about what your body is telling you it actually needs. If you're craving ice cream, chances are, your body is calling for calcium. In that case, start eating those leafy greens and you'll find that craving going away. (And in that moment, maybe munch on some sesame seeds for an immediate snack.)
Get active with your daughter. Maybe institute a daily dance party as part of your daily routine! Or the usual, go for walks. I got a membership at the gym last winter and all I did was walk laps with a book in my hands. It was great! You could take your daughter and make it "healthy habits" time. Three is not too young to walk laps for half an hour.
Don't do any special exercises that aren't approved by your professional pregnancy health care provider. SERIOUSLY.
Have fun!
L.