Pasta and noodles aren't good for cutting weight. Also, what brand of yogurt? fat free? If so, the only thing to worry about with yogurt is that it contains a lot of sugar, so don't eat too much and make sure everything else you eat doesn't contain much or any sugar.
Not sure what you drink. I drink only water and my protein shakes mixed with 3/4 water, 1/4 2% milk.
Make sure your tuna wraps are on wheat. Wheat is a much better carb than white flour based breads and such.
Looks like your having trouble with finding workouts for the chest area just like I was, going by your training schedule. I'd get a pullup bar. Cheap (40$ for a nice one; Iron Gym Extreme Edition on Amazon.com) and good for lots of different chest, ab and arm exercises.
4 days is way early to see much of anything though. Keep at it.
My tuna wraps are on wheat and I also decided to add a salad in for lunch too. I found that the 1 small wrap wasn't filling me so a low calorie salad did the trick