Still Losing Weight

Yes, I'm very overweight. But after three weeks on my diet I have managed to lose 15 pounds so far. I'm walking for about 40 minutes in the mornings and evenings and watching what I eat (avoiding fast food which is full of fat and calories). I mainly eat soups, turkey sandwiches, grilled chicken fajitas, and other low calorie/low fat things. Hopefully I can keep losing about 5 pounds a week and make my goal of reaching 250 pounds by the end of August.