Buddhism talks about letting go. In a few words what this means is to let go of attachment to things. And this will end all your suffering.

By Attachment what i mean is: Emotional investment that you put into something. It can be family, money, car or almost anything. I guess in your case your kid.
This might help you in some ways.

The other thing that is necessary for ending suffering is to let go of is your thoughts and emotions. What i mean is that you must not entertain any thoughts that negate your mind. (to achieve complete balance you must avoid even happy thoughts) This could be important because you might be clinging onto a happy thought thinking that it might be a rarity that you get happy thoughts, but that thought itself is untrue. Let go of all these things that affect your emotional response and you will realise that there is nothing to bother you anymore.