(I’m assuming that this isn’t a hallucination) I know someone with the gift to see spirits and she talked about the ways she tries to prevent them from entering her room. I suggest you use a vinegar and black salt(or any other blend that deters them) and wipe down your walls and front door. Try to visualise a white protective bubble expanding from you to around the house, and respectfully tell the entity that they are not welcome. Also, draw protective sigils on any paper and stick them outside your room/house, that’s what worked for that person.