I had carb/sweet cravings combined with meat and veggie aversions (and increased appetite rather than morning sickness) all through the first trimester. Since I cut grains and sugars out of my diet over a year ago, and veggies and meat had been my go to foods, that was rather unfortunate (and I gained nine pounds by week 14). I know folks say that your body will know what it needs and to listen to what and how much it asks for, but I'm pretty sure mine was lying for a few weeks there. There's no way it needs mac and cheese, ice cream, or fried food.
Thankfully, it seems like the start of the second trimester was the turning point and I've been back to clean eating and exercise. I really hope I don't suddenly have an even greater increase in appetite or I'll gain WAY too much weight.