Giggling Little Girl

I am a 19 year old girl and I have been having some paranormal experiences. I think it is kind of cool except when I am alone and hear it. I sleep in the living room with my boyfriend (our room is being redone) and we start hearing strange things. We were watching South Park on my laptop and we both heard a girl laughing, hesitant to say anything to each other because we didn't want to sound paranoid. So we kind of just looked at each other and then both came out and said what we heard. It was frightening. My boyfriend assumed it was just people out front so he went to go look and then we both heard it again loud and clear and he came running in. We turned around and the puppy that we have who is 6 months was sitting here like someone was playing with him. No one else was down here.

So after that me and my boyfriend didn't get much sleep so we went to sleep early the next night around 9pm. My brother in law and his girlfriend sleeps in their bedroom upstairs. They heard our big dog barking and howling for about 20 minutes right next to our bed in the living room so they decided to come down and see if we were playing with him or something. So they came down and we were sound asleep. As they started walking down the steps 3 loud knocks happened on their parents bedroom door so they ran back upstairs.

The night AFTER that My boyfriend, brother in law and sister in law all went down to my sister in laws house to sleep and hangout. When we came home the next morning his parents told us about how they came down about 10 times because they heard a little girl laughing and didn't know what it could have been. They checked the whole house a few times and nothing. Up in their room with the air on and still heard the little girl laughing about roughly 10-15 times. We didn't even tell his parents about anything that had happened in the previous nights and asked us if we had a cell phone or something there that was ringing. We had nothing of that sort here.

Creepy.