Gloria - I saw the thread you posted with the food and since you have a couple messages I'm just going to reply on this one.
Every body is different and has to find the right balance of calories and exercise. In both of those areas you have to find what works for you. For me it was 1800 calories and exercising 6-7 days a week. If you are taking in 2100 calories a day and depending the amount of exercise it may be too much. It may also depend on how accurately you are weighing and measuring your food and accounting for everything. So many variables go into it all.
I know how difficult it is to have "kid" food around. I have 2 young boys. I do my best to offer them healthy options and even as toddlers I encourage them to make the smart food choices. During my journey I have found seemingly innocent kid foods that have been triggers for me....such as cereals and teddy grahams. I've learned which kid stuff to bring in the house and what to leave in the store. It also may help to separate some of your food from theirs. When you are hungry only hit your stash.
Plan, plan, plan! That is so key for me. The night before I have my meals and snacks thought out and packed.
As for the foods you listed on the other thread...I think you have some good ones in there, but I would suggest more protien - possibly some egg whites (with an occassional whole egg in the mix), more lean proteins (check on your salmon measurements), I'd personally eliminate things like the crossiant and the potato salad. Instead maybe go for whole wheat bread and veggies/fruit. Feel free to keep posting your menus and we can certainly give you ideas.
I know how how difficult it can be to figure this all out. You are surrounded by wonderful people here and we are more than willing to help out. Do you best not to get frustrated. Weight loss is a journey, an adventure...enjoy it! You are going to be out of the 300s in no time! Just wait and see!
Ramble over for now...