Figure That Knocked On My Door

I live in a small town in Cheshire, England UK. My house is a small 2 bedroom that is approximately 125 years old. I'm an only child and I live with just my parents. We have had paranormal experiences here before, but I'm going to tell you my most recent experience that I can't stop thinking about.

Ok here goes. I'm a typical 16 year old teenage girl, and I love to play my music loud from my bedroom. This particular day I had it on quite a high volume so I couldn't hear anything from any other rooms or downstairs.

So there I was, dancing away in my room or doing whatever (probably tidying up or something, I'm not the tidiest of people) Apparently whilst I was doing this, my mother was calling me from downstairs to come and get my lunch, Obviously I couldn't hear her and she gave up after calling 3 times. She was in the kitchen and my dad was also downstairs.

Needless to say my mother was pretty annoyed that I didn't answer her but I couldn't hear so I just continued. Then all of a sudden, I hear 3 distinct knocks on my bedroom door, loud enough to be heard over the music. I looked at my door expecting to see my dad wanting me for something, but instead all I see is a human shadow walk past the door (the door was partially open by a couple of inches).

At this point I think it's my dad as I thought he was still upstairs, I thought he was telling me that I was needed by my mother by knocking on my door, and that then he proceeded to walk into the bathroom, which is directly left as you come out of my room (and this is the way the shadow went). As I think it's my dad, I walk to my door and open it fully. I look left expecting to see the bathroom door closed because supposedly my dad was in there, but it's open. I look around confused as ever as I literally just saw someone knock on my door and then walk into the bathroom.

At first I thought my dad was playing a prank and hiding behind the bathroom door so I even went and checked. Of course there was nobody there. So then I think ok maybe he's in my parents' bedroom, but I take a look and their door is already open with no one in there.

Now I'm a little scared and I race downstairs to my mother and say to her, "Have either of you two just been upstairs?" Also now I see my dad sitting comfortably in a chair in the living room. She replies with "No, why?" and I proceed to tell her that someone just knocked on my bedroom door and walked into the bathroom. My mum was quite intrigued as she likes ghost stories but my dad wasn't really bothered.

So yeah basically this happened to me and there was no one living who could have physically done it, as I was the only one upstairs. I do have some questions that keep coming to mind about this...

We do know that we have some sort of presence in the house, but usually things just get moved around for no logical explanation or we see orbs. We never have seen full body figures until this event. So my question is, why the sudden heightening of activity which has progressed up to shadow figures? And whoever this person was, do you think they were trying to be helpful by notifying me that I was needed? Or do you think they were getting annoyed at the fact that my music was too loud, and they had had enough of my mother calling me and all the noise?

Any responses would be greatly appreciated, thanks, Katy.