I'd suggest not cutting out carbs totally- your body and growing baby (!!) do need them for energy and to balance digestion. You just have to be sure to balance the carbs with veggies, healthy fats, and protein.
Cold cereal with milk - especially depending on the kind of cereal you eat- does have a lot of carbs, and not enough fat/protein to balance it out. If you add finely chopped, toasted almonds (put in a coffee/nut grinder) and a cut up banana to special K or Cheerios, and use milk with some fat, that is much more balanced (my mom is diabetic, and this is her go-to breakfast, recommended by nutritionist.)
However, warm oatmeal prepared with milk or water, with a handful of chopped nuts, cinnamon, and some berries would be a good option. just don't add extra sugar.
A smoothie with frozen blueberries, whole milk yogurt, some wheat germ, and almonds is one of my favorites. (I even added protein powder while I was pg, bc I ALWAYS wanted protein and was soooo hungry while pg!) you can add leafy greens to this and the berries/nuts should mask the flavor.
A breakfast burrito like PP suggested would be great!
low sodium vegetable juice, a banana, and 2 slices of 100% whole grain toast (the kind or bread with seeds, oats, etc in it) with nut butter spread on it is another go-to breakfast for me. my favorites are peanut and almond butter, but you could use cashew or even sunflower seed.
Breakfast tortilla bowl: whole wheat tortilla, eggs, salsa, avocado (or guacamole!) and cheese. Prep the night before: shove the tortilla in the bottom of a microwave safe bowl, pile on eggs (that you've cooked already), cheese and salsa. In the AM, throw in micro for like 1.5 min on medium to warm through, blob on guacamole. enjoy! add peppers if you like (but they always gave me gas during pg)
chicken sausage and a whole wheat pancake (made in advance, toasted in AM) with reduced sugar jam/jelly. (I put reduced sugar jelly in the micro and make that into my syrup instead of pure maple syrup sometimes.)