Multiple Strange Happenings In My Home

This is going to be a fairly long post, so I'll give you some background first. I'm a believer although I try as hard as possible to debunk things or come up with theories as to how something happened. Also, I am a real night owl, I sleep from around 6am until 2pm, basically every day.

My patio backs on to a really small yard, which is all fenced off, which backs onto a natural forestry that has a creek and such behind it. I have neighbours either side of me, both of which are elderly (I live in a residential street that doesn't have many houses, the blocks that actually have houses are old people. I'm one of the only people under 60 apart from my parents). This whole neighbourhood was built on aboriginal property, but this house was only built about 15 years ago. I've been living here for 8/9 years now, but there were no prior incidences in this house. It's ground level, one story, and has concrete under linoleum floors.

First story, just a minor detail I suppose.

I had a few VERY spiritual friends. I actually lost most of them after they claimed my house was either evil or haunted, and then refused to come back. The others stayed friends but refused to ever come into my house after staying there once.

Second story, an actual "haunt".

I was about thirteen when this happened, but I still remember it and it still freaks me out. In my house, it isn't "uncommon" to hear footsteps around the house, even when home alone. It was about midnight, and there were really loud footsteps, when the smoke alarm went off. I was too scared to move, and so I didn't. I think at that moment, I would rather have burned alive than face someone wandering the hallway outside my bedroom. The footsteps kept getting louder, but they were so calm, it was unnerving. They stopped right outside my door (I'm at the end of the hall) before I heard the sound of someone grabbing the doorknob. Then they just let go. I couldn't see any light under my door, but I heard them walk off. It sounded like an easily 200lbs person in work boots. My family consists of me, my mum, and my dad, but nobody owns work boots.

They walked off again until it sounded like they were around my kitchen area. The fire alarm stopped, but the footsteps continued for what was easily another five minutes, then they just stopped. No walking out, no doors opening, nothing. I sat up in bed, still trying to make no noise, and just waited. A couple minutes after, my mum's bedroom door opened, and I heard her walking towards my room. She came in my room and asked me why I was walking around at night. I told her what happened, and she told me that she didn't hear anything other than footsteps, but assumed it was me because my dad was still in bed.

Unfortunately, due to a medical condition, my mother's memory is almost non-existent, but she did remember this up until around two years ago. It still scares me to think about, because I just remember being so frightened. It almost felt like the thing was waiting for me to open my door, or trying to find me. I still don't know what happened with the fire alarm. It's closer to my mum's room than it is mine, so she should have heard it first.

There are also multiple times when me and a friend have heard whispers or talking from the next room over, even though there's been nobody else in the house. I've woken up with strange bruises that haven't hurt, and I seem to always be seeing people in my peripheral vision. Has anyone else had a similar experience?