Hightened smell

Ge

So I was playing sims 4 and my son was on the love seat behind me.. for like 5 minutes I was smelling something and didn’t know what it was.. I kept asking if he was smelling something he said no.. it wasn’t till I was putting him to bed when he said it might be the soap on his hands.. a bar of dove soap fell onto the bathroom floor and he picked it up,.. so the smell gave me a headache.. still have no idea why I couldn’t smell the fact it was soap but what is weirder is that he was sitting behind me like six feet away..... I could have swore it was right beside me..