Thank you for sharing more about how things are for you at the moment Sarah18. I’m sorry to hear that everything happened so quickly after your mum was told that her cancer had returned. It’s understandable that you are not talking with your friend about your Mum when you are concerned about how emotional it may make her. Dealing with hostility within the family in addition to grieving can be tough at an already emotional time. It is completely normal to feel low on some days and be managing a bit better on others.
Not everyone feels that they need to talk to their GP but if you do at any point, they can offer support in other forms such as suggest counselling options and bereavement support groups in your local area.
I’m pleased that you are seeing the community as somewhere that you can begin to share how you are feeling.