Memories From The Past

I have memories of many things from when I was younger. One of these memories is visiting my gran in the hospital she worked in. The room I remember is in black and white, and my gran is making beds in the ward. She is wearing a long white nurse dress and has a small hat on. Being young I thought I did actually experience this, but after checking with mum when I got older, she looked confused and explained to me that my gran stopped working around ten years before I was born.

Another memory is sitting on our chair that is placed at out front window, looking out and seeing a silver car towing a pale orange static caravan. This was one I didn't think I experienced, but again, I decided to ask my parents and they told my they did used to own a silver car and also, an orange caravan, but got rid of it two years before I was born. By now I was creeped out.

It didn't stop there but, I had memories of my gran smoking, and my other grandpa smoking. Gran supposedly stopped smoking a couple of years before I was born. I remember watching my dad's friend rolling tobacco and I said that my Grandpa used to do that, my dad looked at me shocked and asked how I could possibly know that if he stopped also a few years before I was born?

My last before birth memory is of a boy, I don't remember his name, but I used to play with him when I was younger, or so I thought. I remember walking to the shops with my mum and we pass a row of houses on the way. The house has a brown door and is number nine, same as mine. I remember a small blonde haired boy with no name. Maybe around a year and a half ago, my mum and I passed the houses again for the first time in a while, and I turned round and asked, 'Do you remember that boy I used to speak to in that house when I was younger?', and she looked at me and just kept asking who I was talking about, she doesn't remember me ever going near that door, and there's no-one around my age who lives there.

I'm really confused at how I remember all these things, I've looked everywhere on the internet and I cannot find an explanation for this.