Bridget,
You don't say how many personal calls you are making/receiving and what they are about. Regardless of your situation, your employer expects you be focused on work when you are at work. If your husband, mother, etc. are just calling to check in with you, ask them to stop unless it is an emergency that will require you to leave work. Tell them you will call them on break or at lunch to check in. You also don't say what your childcare arrangement is. Whoever is watching Aaron for you should know your wishes and be capable of making small decisions for his care based on those. Now if he becomes sick, they should call you immediately by all means.
My point is this. When you are at work, you are an employee not a mother. Once you walk out the door then you become mommy/wife again. If you are unable to keep the two jobs separate both will suffer. I know my view sounds cold, but it is the distinction I have had to make in my life. I love my children and would have loved to have been a stay at home mom but circumstances didn't allow it. However, if I don't keep the two separate I could lose my job and then where would we be?
Michelle
