I agree with Cracker case, if you taking care of baby by yourself then your weight will be back to before soon. Now my baby is 3 month tomorrow, and i am taking care of her along, my husband is in China now, now my weight is back to normal. Because i am too busy to cook, my main food is salad and sawiches. But i am really missing Chinese food.
How lucky you are upstairs, Just try to eat health food your weight will be back soon.
Ps: i am still breast feeding my baby without formula and i am not drinking soup, but i drink lots of water everyday.