I'm sorry for your lost, but I do have to admire you for trying to go away. I tried just to go out to a diner by myself at a diner early so I wouldn't feel funny. I started to cry I had to ask wrap it up to take home and still couldn'teat all I did was cry.
I know that feeling, if you read some of my more recent posts you will see I am faced with the same uncaring or perhaps just plain ignorant spew from my siblings. Some seem to think they will be OK if they should loss their spouse because they have a large life insurance policy. They know so little about real love you have to wonder if they ever really experienced it.
Welcome to our group, I am so sorry you are here with us. I, too, lost my spouse to lung cancer, my Rose was not quite 56 yrs old when she passed 2 days after thanksgiving 2010. We had been living together for 31 yrs, since just after my 18th birthday and married for 30. Not that it matters how long you have been together when you truly love someone and you lose them the hurt is still the same.
Thank god for your son and his support but you need more then that. Is there a member of the clergy or a counselor or doctor that can impress upon your siblings that you need their help? You can always come here to vent, talk, read, or whatever helps you.