Sudden death is so awful, the shock and disbelief are devastating. People have no idea unless they’ve been through it.
It is only a few weeks since your sister died and I would imagine you’re still in shock
When people ask you how you are tell them the truth. Don’t feel you have to cover your feelings up just say - " I can’t believe it’s happened " " I’m really upset about my sister " or whatever the truth is.
My partner died suddenly and unexpectedly in March 2018. Talking to a counsellor helped relieve the pressure . Friends and family all wanted to " fix things " and said things that made me feel worse.
I still can’t believe its happened at times.
Nobody can fix this and there is no right or wrong way to feel. You feel how you do and shouldn’t force yourself to feel better for other people’ s sake.
Take time to grieve for your sister, to think about her and talk about her.
Best wishes at this sad time, Jx