Doppelganger

Yesterday night after I fetch my wife home at about 10pm plus, she went to have a bath..After that I went downstairs to shift my vehicle..Then when I came up and the moment I step into the house, I saw my wife standing at the bedroom doorstep looking at me and walked into our bedroom..SO I thought she had finished her bath and I took my clothing which I placed in the living room earlier with the intention to go to the bathroom to have my bath..Then I noticed that the bathroom door was locked and I knocked and my wife was still in the bathroom!!And guess what, when she came out, she was wearing exactly the same outfit with the "person" whom I saw earlier!! Then I told her about it and she mentioned something about "Doppelganger" which was a bad omen. Today I checked on Yahoo and there were really cases of doppelganger which meant a double of a living person and when seeing own doppelganger or doppelganger of the friend or relative means something bad is going to happen or a bad omen..This is the first time happened..Hopefully I am just imaging things last night and not the one mentioned..
PS: Right after the incident while having dinner with my wife, I got choked on the food I was eating and was nearly out of breathe..Luckily, I was able to get out of it...Is it a sign or something? I guess no one knows..