Could this be a ghost or some sort of paranormal thing...

Okay so in my computer room I always randomly smell old lady perfume.
It happens like once every two weeks & it's very strong. It's as if someone had just sprayed it all over me. & it also gets freezing cold in there. Like it'll be 100 degrees outside in the dead middle of summer and it'll get freezing & I do not have an AC. Then last night by dog (She's a German Shepherd) was staring up at a corner for like 10 minutes. She had her ears up and her head tilted. She wasn't growling or anything just staring for a long time, so I figured it was a bug she was seeing or something but then about 20 minutes ago she did it again and she was staring at the same spot.
This all happes in the computer room too.
It doesn't scare me I'm just wondering what It could be?
& Don't tell me ghosts don't exsist because I strongly believe in them.

this might not mean much to you because i'm only 14 , but i think that it could be . I believe in ghost too . it sounds just like a ghost . nothing you should be worried about just yet . maybe you should go to a library or something and check thehistory of your house . it also might be a spirit that just attatched itself there . i'm totally into that stuff so feel free to email me or something :) , i really do hope i helped.
oh and how long has this been going on for
?

Ghosts dont exist: You probably have the chills. Someone is playing a prank on you by spraying perfume or you are sick and are smelling random things. The dog was probably seeing a bug. Do not reject logical answers just because you believe otherwise... This is under science so expect rational answers, and anything paranormal is plain fatuous.

From what you have said I would be inclined to consider it possible that there is a ghost or other spirit present. At least nothing you have said rules out the possibility, but only a good investigation would reveal for certain.