If you are feeling better it could be that your body is healing before it will lose weight.
Can you change your larabar to a small handful of assorted nuts (different nuts have different minerals), seeds, coconut meat, olives and/or some fruit like blueberries, strawberries or other recommended fruits? This way you'll get enough calories and a wider range of vitamins and minerals. And don't forget the fat you are baking your eggs and meat in also counts. Counting calories correctly is difficult. It is easier to eat when hungry once you have figured how much you need to eat to lose weight, and only once in a wile check if you are not creeping up with the calories.
Have you read the PB book yet? It has a chapter on calculating how much protein and other stuff is recommended. 1500 sounds ok but it depends on your height, weight etc. You should be eating the amount your body needs to stay alive when you are just laying in bed all day. If you get out of bed you use more energy, this will be the deficit your body will get from your fat reserves.
Walking is a great way to start moving more and is gentle exercise for your bones and joints. It will also slightly increase the calories you burn. And the toddler will give you more exercise and probably some heavy lifting