does invisible powers exist?what I saw I can't believe

There are thousands of movies, plays, novels and dramas which we have seen, yet most of people think do they really exist or not? Those who saw something will whisper "YES!" Those who have not such experience will say" NO! Are you a freak-in nut, there are no such things."
In my case well! I do believe because I have experienced something five years back.Its not like something suddenly comes in front of me as we watch on screen. its something you sense someone is here.invisible but yet it is there.
Me and my sister share the same room and like all sisters we fight and mostly on the useless, stupid stuff. its natural! so it was a same night we fought on something and I went to kitchen to drink water.
 One of friend called me and I was surprised on late call. we talk around fifteen minute than my sister entered in to the kitchen.
she said, I am scared
I was still angry so I said, for what?
she said, there are some weird sounds are coming from our room.
I asked, what kind of ?
she whispered, someone opened the lock of our window!
I replied very carelessly, "really"! come on! don't scare me like that. and don't make stories. go and sleep. I am coming.
she left and I continued my call. I shared the story with my friend and laughed that I guess she wanted to end the fight,so she made a story.
After a few days even though I don't believe on her but I observed our room like an investigator. I know her she mostly don't do such things.
And one day what I saw, I cannot believe it.
I was sitting on my bed and a sound start coming, I move my eyes to every side of the room and especially at windows as she mentioned me. but this time its not window, its the door of our attached washroom.it was really horrifying as the doors handle was rotating. I was shocked, breathless , can't believe what I was actually watching.
I rushed towards my mother and told her everything. she said very precious words.
she said" if you don't harm them or disturb their comfort zone, they even don't enter into yours"
I apologize to my sister for not believing her.
we stayed in the same room two more years. but we never used our attached washroom. We started to use the separate one.
we did prayers and they really impact as we were scared. no one can change their home at once .luckily problem solved. as we observed we use separate wash room first but on that days we have started to use our attached one.
I still feel that terror
have you experienced any