Hello
Okay, so your BMR is 1344 calories. You don't want to go below that number because it's the amount of calories your body needs to survive/function properly. If you go below it, you'll lose weight initially, but then you'll soon go into "starvation mode" where your body will not allow you to lose weight because it doesn't know where it's going to get it's nutrients from.
Completely understand and don't worry, it seems everyone is most concerned with your abs area, so you're NOT alone

So, you're a stay a home mom with some very active kids. Great....let's try to get your calorie consumption in the range of 1500-1700. Do you use a free app to track your calories? I usually recommend My Fitness Pal if you aren't using one. www.myfitnesspal.com Also, how do you calculate calories burned in a workout? Do you have a Heart Rate Monitor or are you using the guide that came with the program?
Stephanie