You are not alone. I returned to part time teaching in September and since then both my children have been in hospital, one has had a really bad time with his asthma. I saw the light last week when my son was rushed to hospital and one of my first thoughts was- how am i going to contact work? and a host of other teaching related things, At the moment my children need me- but my mind is(like yours) often on teaching/planning and other people's children. Have no idea what i am going to do but juggling both a family and teaching is too tricky for me at the moment- even though i do really love teaching.