Hi V.,
I will most definitey keep you and your family in my prayers now. :) I can only imagine how scared you must be feeling. My husband recently had a cancer scare and we radically changed everything from diet and exercise, to toothpaste, deoderant, everything! IT has definitely helped, and is something to consider for you as well.
Back to your question, your kids love you and are feeling your pain. This sounds strange but talk to your kids. I don't mean tell them every detail, but talk about things that are happening. The reason they are acting out is because you are afraid, and probably most people around them are, so they have become afraid too, and may not understand it.
Recall that God calls us to come like children. They are so smart and know so much more than we give them the credit for. Even if you are not spiritual, God can and will help you if you ask.
It must be challenging to stay patient and peaceful but do try because it will help. I can tell you this, in our family my husband made a choice that cancer would not beat him and he would be unafraid. He stood up to it becasue God teached us to fight disease because it is not supposed to hurt us. I know you will fight, for God, yourself and your family. You can do it! Just be brave and choose to not only live, but be happy so your kids can be at peace.
When my husband gave it to God we were lead to the right DR who has studied the therapy my husband has just finished going through, and plans to go through again. Also, the rest of the family has been led to make healthier decision about diet as well. So, know that your children just need to realize that whatever they are feeling is normal, you are not angry and you appreciate their love. Merry Christmas!
Blessings to you and your precious family,
K. S.