KayB55 - I read a research article in the field of psycho-immunology - the very fact of diagnosis can have an impact on physical, emotional well being and cognitive functioning, eg, fatigue, confusion, poor short term memory etc. As you have held the position of HOD I can appreciate your capacity to think and act quickly, make decisions on the run, put out 'bush fires', encompass differing needs, wants, demands, and opinions in your every day decision making etc etc and all the while making sure the curriculum is covered as indicated by student learning outcomes. Whew! I feel exhausted just thinking about what a 'normal' day must have been like for you.Yes, the young and ambitious substitute could be a source of irritation and possibly stress, however, if you hold a permanent position she can think, look, feel etc however and whenever she wants, it doesn't have to touch you. Your micro planning is a great strategy - it will help your brain to 'join the dots' so to speak. By doing this you literally 'map' the day into your brain and being well prepared can boost your confidence. I agree, don't tell your colleagues, you risk the 'poor you ....' comments and glances - not to overlook their genuine care and concern, but keep it out of the work place. Its great that you do have a small group that you can be 'real' with. If possible go slowly when term begins and also, if its possible lie down for about 15mins during lunch break or put your feet up and yes, I know there are some teachers who would laugh at the very thought of finding 15mins during a normal teaching day. If you forget something the world and your world, will not collapse, in the final analysis ask yourself, 'What is the worst consequence if I forget .......?' When doing your lists and notes perhaps include a PRIORITY list for each day and tick off each thing as its done - yes ;) I know that you will need to remember you have a list, but there will be good days and very good days. Most importantly be kind to yourself! XXXXX