The thing that jumps out at me, aside from obviously the low calorie count, is the lack of carbs! That alone would keep your metabolism low, IMO.
Breakfast looks fine. Find a carb to go with that chicken at lunch. I don't know the contents of your "protein ball" after your workout, but if it's supposed to be high protein and is only 150 calories, then I'm guessing it has very few carbs. If there is one time where it's best to be getting more calories and carbs, it's in that first meal after the workout. I think that is very much a make-or-break kind of thing as far as keeping your metabolism up.
I won't even comment on the 50 calorie snack.
Anyway, I would ditch the low carb EAS shakes and replace them with either Myoplex Lite or (if you are going for 300 cals/meal) regular Myoplex. I don't think you need to go all the way up to 1800-2000 calories (unless you're doing it temporarily to boost your metabolism like I suggested); that's how much
I eat per day for weight loss and I'm nearly 100lbs heavier than you. After you get your metabolism up, I think 225-250 per meal is a good target for you.
If it's hard for you to get down that much food, then you can try to get a bigger proportion of it as liquids... Myoplex, protein powder shakes with fruit blended in, etc.