Sissa,
I am sorry you are going through such difficult times worring about your baby.
Some things are just out of our control. Make the best of it with the time you have left with him. He could be with you for many years to come. Just love him and make him comfortable. He is lucky to be in such a loving, caring home with someone who will give him the love he deserves. Be strong for him and take care of yourself. He's needs you!