Do not attempt spirit communication if you are afraid of it.
Anyone proximate as you attempt to communicate with spirits can either contribute or contaminate the process based on their own energetic disposition. Being overly tired makes you physically vulnerable and less in touch with what is going on.
When we are fatigued or exhausted it is easier to misread energies and misunderstand messages.
People, no matter alive or dead, are limited by what they know and desire, just like you.
An earthbound spirit (or one that dwells more closely to the earth plane than more enlightened spirits) may not know more than you, and they may also have a different intention than you.
If you want to make contact because you think it’s cool, have a fascination with death, want to frighten people or simply want to boast about it to others, you are doing it for the wrong reason.