I can't accept the death of my family. Since their death, I have been having nightmares, afraid to think about it, for fear that I will go crazy.

According to what you said, you may need to live in a different environment, which will greatly ease your situation.

Moreover, in your description, I'm afraid you have caused yourself a lot of pressure and need to be relieved in time.

Personally, I suggest not to be exposed to superstition in the near future, and try to see psychological counseling. Solving your troubles scientifically is the right way. If you are superstitious at will, you will put more pressure on yourself.