This happened in 1991 in a flat me and my ex-husband stayed in with my eldest son who was just over a year old.
I never felt anything strange, in that flat when we moved in until one night something strangled me. I was fighting for my life that night... Or for me it felt that way, in that moment it felt like ages that I struggled to get out of something's power. It felt like something was sitting on me and I couldn't get my breath. I felt a power over me that scared me. I felt so weak against this force. I fought it back and just started to pray. Eventually it left me and I jumped out of bed. I thought it was a bad dream but I realized it was not because I was fully aware of everything that was happening and a cold wind was coming from the window and blowing the curtains high up into the air. I was so confused when I saw the curtains and felt the cold wind. I remembered closing the windows before we went to bed. I jumped for the light, checked the windows and they were all shut. Everything just calmed down all of a sudden. My husband woke up because of me waken him up by putting on the light. He was not aware of anything at all like usual because he is not sensitive to these things at all. A few weeks went by and nothing strange had happened during that time until one day when I was busy cleaning.
The front door was open and I turned around because I felt company. As I looked to the door there was my ex-husband coming in but it was strange because he was dressed in his grey suit. As I checked out this story he just walked halfway to me and then disappeared. I couldn't believe what I just saw. It was so real. I was not frightened by it but rather puzzled. Till today I'm puzzled about this doppelganger. I don't know what the meaning of this might have been. I never saw it again. I don't know if anyone here can tell me, what the purpose is of a doppelganger. I don't know if I can connect the cold wind with the doppelganger.
We stayed there for a view months then moved to another flat. We moved to be near his work not for other reasons.