Ok so some realy STRANGE things have been happening around my house lately. . . . i seriously think its haunted

three times now in the last 5 months or so iv walked up to the second floor of our house and at the top of the stairs, always alittle to the left in the same spot, is one of my stuffed animals. The first two time it was a stuffed bear my old boyfriend gave me and then the third time (today) it was a stuffed horse i got at chincoteague. it cant be any of our animals because they dont have acsess to my room and its deff. not my parents

also on our frount door we have a dead lock and at the begining of the week my mom put a key in it so we dont loose it (she did not lock the door with it), well no one locks the dead lock and the last couple of days iv come home and unlocked the doornob just to notice the dead lock is locked too. I asked my parents if they have locked it and none of them have.

there was also an incident a while ago were i woke up in the middle of the night to hear a noise, its hard to explain but it sounded something like one of those water bird whistles
<img src="http://i41.tinypic.com/307nhp1.jpg" border="0" alt="Image and video hosting by TinyPic">
and the even stranger thing is the noise was comeing from were i keep my stuffed animals.

i am so paranoid and scared
i dont even want to go to bed tonight
its so much stress on me that my stomach hurts and im shakeing as i type this

this is no joke and if you dont believe in ghosts i think you should start