Screaming or howling

I had this dream when I was about 2 or 3. I was walking down a pier which had an old wooden building next to it, to my left there were skeletons being hung from a chain connected to a log and a wooden wall to my right. As I rounded the corner there were a pack of dead people who were standing there mumbling looking down at the ground, I thought that they were normal people, I took a step towards them and the wood creaked loudly, they all instantly looked up and screeched and growled, they ran towards me screaming words but I could not register what they were saying. After they were about three or four metres away from me the skeletons came to life and jumped down next to me holding swords and killing the undead, one of the skeletons picked me up, I screamed at the top of my lungs saying "let me go!" The skeleton covered my mouth and jumped onto a row boat and paddled away from the peir. The undead screamed and yelled then jumped in the water after killing the skeletons. The skeleton that was in the boat pulled out a really old pistol (like the ones they use in pirates of the carrabean) and shot them all. Then we reached a tiny sand island with a palm tree and then I woke up from the dream. My mum has only recently said that this dream was my nightmare every night for about 2 years or something, she had to keep getting up at 3am every morning so I would not wake up crying and screaming, but then I kept on having the nightmare earlier around midnight. My poor mum haha.