Shalom in Yeshua Ann, I am sorry to hear of the death of your son and the difficulties that have arisen as a result. Please know that I have said a prayer for you to be comforted.
You really must share these problems with your loved ones. It is too much of a burden to carry on your own. They need to know that you are doing what your son wanted you to do. They have a right to know this and by telling them they will then understand, and they may be able to come up with some creative ideas to solve the problems.
You must stop feeling guilty about you sons death. There is nothing anyone can do when it is our time to go home. God calls and we go to him. He will be able to hear you so talk to him as if he was in the next room. The pain you feel right now is something that will subside over time, but you need your family's love to help you through this period.
Please keep talking to us.
May God bless you