We'd just moved into our first home in Australia (we are British) it was a 2 bed ground floor unit (only one unit above it and was empty throughout our time there). House was laid out (from left to right)
Bedroom one with ensuite bathroom, living room next to the bedroom(living room at the front of the house, bedroom in the middle, ensuite at the back) , kitchen in the middle of the house, bedroom 2 (huge room) at the other end. We always felt a bit... odd. In that second room, which is why despite its size we just didn't want it as our bedroom. we also had weird smells occasionally, like food cooking (like fish though we don't eat it, or onions. Again not something we cook with generally) I'm not sure if that's relevant or if it was something else.
I was woken one night by the sound of a baby screaming. Dh didn't hear it... but we didnt have a baby. It seemed to be coming from the 2nd bedroom. As I got halfway across the kitchen the crying stopped. I had an impending sense of doom. I'm not sure if I thought paranormal or "has someone dumped a baby in my bin?" But I definitely thought something's not right.. I got to the bedroom. I saw a woman crying over an empty cot(the room should've been completely empty) . I thought I was dreaming, the woman had long dark hair, olive skin and was wearing a white nightie. I tried to talk to her but at first it was like I wasn't even there. She didn't seem to see me or hear me.
Then all of a sudden she turned and screamed at me for taking her baby. She just kept saying "you've taken my baby! Where is my baby? I know she's here!" I slammed the door shut, ran across the house and locked myself in the bedroom. Dh was still asleep.
With the noise she was making I was beginning to think I'd imagined it... surely Dh would've heard it and woke?
I tried to forget about it and thought I was going a bit nuts.
A few days later I was working late and Dh got home before me (rare). As he approached the gate he could see someone With dark hair was sat on the living room sofa (but could only see from the back) He thought it was me. (I have dark hair, by the way). He opened the front door and heard a baby crying, seemed to be coming from the 2nd bedroom. He came in and realised the living room/sofa was empty. Went to the 2nd bedroom and saw it empty except for the woman curled up in the corner sobbing. He tried to approach her and she disappeared while screaming.
He rang me shaken up, I was leaving work by this point. I couldn't understand what he was saying so just rushed home quickly. He looked like death warmed up and was sat on the sofa. He told me what happened, we talked about what I'd seen too and We made a decision then to move and we were trying to think of a good excuse for the landlord to allow us to break lease and move elsewhere (we had over 4 months left on the lease).
That night I got up for a pee, I was sat in the ensuite and heard rustling around and footsteps in the bedroom. Presumed Dh was also getting up for a pee. I finished up and as I was opening the door I saw her again, She was standing next to DH and started to shout "X isn't breathing! Phone an ambulance! She's gone blue!"
Dh got up and ran for the bathroom and locked himself in thanks Hun and the woman ran to the 2nd bedroom. Then it all stopped. We searched the house, everything was back to normal and she was gone.
We packed our things and moved into a motel while we wrangled with the landlord. When I was at work not long after we moved out a coworker said to me "I can't believe you took that unit on SuchNsuch street... I wouldn't" I asked why. Then she told me what had happened (and I was able to verify most of it with a newspaper report)
Young couple bought it, moved in. Had a young baby (earlier referred to by me as "x", same name). Baby died (cot death) Husband was blamed locally. No charges brought against him. He killed himself in the house. Wife came home, found him dead. Called emergency services but it was too late. Then a few weeks later killed herself in the house. It's said they all died in one of the bedrooms but no one knows which one. I strongly suspect it was the spare room.
My heart aches for her, the possibility that she's still reliving those emotions 
I found out where her family (mum, dad, siblings etc) lived. I considered telling them... but I came to the conclusion that if it wasmy daughter knowing that would torment me mentally. Or I'd look like crazy. So I kept quiet and just moved away.
I'd love a logical explanation.
A couple people have suggested time slips but I don't know if that's logical either! All I know is, for whatever reason it happened, it was the worst time of my life and it still, pardon the pun, haunts me. I'm not sure what I believe in reference to souls and the afterlife but the concept that she may be stuck there reliving that (I never saw the husband or the baby) breaks my heart.