You sure are going through an awful lot right now. I am sure watching your niece is taking a toll on you. I am sorry about
the person that is going to die. Is it a family member or a friend? You will have to deal with the loss of that person, we will be here to help you. But I really think that you need some professional help too. This is an awful lot to deal with. One day at a time is all that you can do. Take things as they come. Try to study so that you don't have to take that class all over again. And the boys will be in and out of your life, that is natural.
I hope that you start to feel better soon.
Take care,
Hugs, Karen
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Here are a few sites that you may want to check out.