Recurring nightmare meaning?

Hi everyone

I've been trying to find a reason for why I had a certain recurring nightmare for about 6 years of my life for quite a while, I was just wondering if anyone here could help me?

I started having these nightmares when I was 6. They were consecutive and happened every time I fell asleep which lead to my parents getting quite annoyed at me (and scolding me) every time I refused to go to sleep, which lead to me rejecting them due to them not protecting me.

I've already come to terms with this and we have a good enough relationship at the moment.

The nightmare stopped when I was about 13 but I have gotten it on the odd occasion since then.

The nightmare was as follows...

I would wake up in my bunk bed (which I had at the time) and I would be on the bottom bed.

I would be sitting upright with my back against a wall looking at a digital clock that would be at 11:59.00 and would be counting towards 12:00.

At this point I would hear someone walking up the stairs in my house very slowly.

I would be in a state of powerlessness, where I had no strength, all I could do was barely crawl and not fight back.

I needed to get to my parents room before 12:00 otherwise I would see the person walking up the stairs murder me in a sort of third person view.

It differed from time to time but it would usually be decapitation, ending with me waking up in a cold sweat.

I would then fall asleep again and repeat the above.

Has anyone experienced this before or could they tell me if if had any meaning behind it?

Because frankly.
It sculpted me to who I am today.

Many thanks

- Will