Very strange.

The previous advices of the other member were right..
It is a spirit, and i think its angry or mad of something..
If you can see hat spirit talk to it and ask it to leave..
If it doesn't work that way, well OMG!
you should find someone who can do spirit cleaning to your house..
If I was there to help you I could make the ritual for the cleansing.. But you are so far away..

I don't understand, i mean ghost are ex-humans no ? Why they would do such things ? I never been bad to anyone in my life.. So it's probably someone i don't know. I'm very afraid that, if i do a ritual for banish him/her and it fail, he/her become very angry. What are the risk if a ghost become very angry against you ?

Hello,

I believe I maybe able to help. Well not physically but mentally. I suggest having everyone leave the house and have yourself or someone do a cleansing usingSage, thyme, garlic are recommended... most commonly sage. Use a verbal assult. Such as

I call upon (God or Godess). To begone this negativity in the name of the (God or Goddess). Make sure you demand it and to be as calm as possible.

Do this in every area of the room and closet and out side area of your's....

And do not mediate in the house at alll..... Until you have done this and you are sure the negativity is gone.