i do Meditation daily for an hour or more and in last week i did meditation while vocalising man-tram ( gate gate paragate parasamgate bodi swahah) and i feel like i am falling in deep trance of quietness and literally i couldn't able to feel my body and suddenly i saw my room with my closed eye and slowly moving upward in a smoky cloud but at the same time my heart beating goes fast and strange very dark fear/horror came to my heart and i woke up , similar happened with me many time back i don't able to understand how to overcome this fear ,my mind says this could be witchcraft/horror attack or its just my mind perception or maybe this is the cause of all those horror movie that i had watch in my past , tell me how to overcome this fear

Thanks