This is the fear of falling in to the backrooms this also a phobia which can lead to have a fear of falling ( basophobia) it a mix of kenophobia and claustro phobia
this can also give you the fear of creepypasta and the fear of monsters( Teraphobie)
How to get rid of this fear?[]
To get rid of it learn the backrooms because they are not real and some people play Horror games scarier Then the backrooms
Some people just say to calm them selves /theres a one in billion chance that i get into the backrooms/
A picture of the some people that have this fear