It is unfair that you are expected to look after your parents and your brother isn't. If you aren't well chances are that you may buckle under the strain and then where will your parents be?

Are they physically unwell? Would they qualify for more assistance? Can they afford to pay some-one?

Tell them that you need a holiday - plan it and give them the dates that you will be away. And tell your brother.

Maybe you could visit their doctor that you are unwell and ask them what they think? They will be in more of a position to assess the situation. Often care giving is a long term prospect and really does need realistic planning.

Please check out the Caregivers Support Thread.