My sister has Stage IV Hodgkins - I don't think we can get through this?

I was going to offer you a little support to your question but the wonderful Jelly23 has done this so well. Take note of everything Jelly23 has said. She's/he's an inspiration and this must give you a great big boost. Life isn't pointless - we are all travelling down the same path and along the path we have take what life throws at us. You sound like a brilliant sister to have so stick with it and be by her side through thick and thin. She would do it for you, wouldn't she? You're a star!!