To solve the problem, we must also untie the bell and tie the bell: contact the family of the deceased, consult the cause of death, attend the funeral, and sincerely pray for the deceased. If not, you can ask the elderly for help, pay attention to dress and talk, and don't travel in the near future. After the confinement, you can take a long trip or travel together to ease your mood.
If all the above fails, it is suggested to get rid of the prejudice against superstition, consult a psychologist or a master, or make a wish in a temple (note: you need to make a wish afterwards).
In fact, I have said so much, and the solution is still in your own hands. Buddhists say that putting down the butcher knife to become a Buddha is talking about putting down the law-that is, the obsession with things. All of the above shows that you are a thoughtful but overly worried girl, it is difficult to forget your past, and even feel guilty about what you have done because of the death of the other party. I believe you will get out of this nightmare soon.
(Note: Don't watch horror movies often, which is not good for sleep. Pick some light humor or some commercial movies, which will definitely be beneficial. )