Please , calm down and take one small step at a time .
If your sister is terminal(i dont know you havent mentioned if she is or not) take each day at a time , any type of cancer can hit the youngest of us and also the weak.
Your sister will need your support , she and the rest of the family will properly need your support , but if you panic you will not see the joy and that of spending each day with those that you love.
The type of cancer your sister has is treatable if caught early like any other cancer there is always that chance.
Having the hope and faith I suppose has worked for many people getting through such rough times maybe perhaps you could realise you stresses that way.Talk to your family try and understand how bad / good the sistuation looks for your little sister , but treat your sister the same as because she has an illness people would treat her different but you are her "big sis" she might look up to.
Be positive and optimistic is generally the better way to be in these situations.
And so indeed carry on each day as best and as normal as you can without worrying every 2 mins or so , i know that it might be hard for such things but think positive and you will be alot better.I am sorry to hear of this situation hope the advice helps.
"Take each day as it comes , for tomorrow can find itself"
Good luck and keep us posted how your sister is doing.x
