Interestingly, I find a similar thing
8 days in and my nose is recoiling at foods I used to like. I think it is just hypersensitivity - rather like a man who wore eye bandages for months, taking them off can be a painfull thing. I expect it will pass as I get used to all the new stimulus at mealtimes.
Right now my appetite is down but mainly due to the unexpected smell/taste thing.
The smell of people smoking still seems okay to me, but not appealling. But WOW, the stink of my smoking friends when they are NOT smoking... gawd, they stink from so far away it is unreal. I was standing behind a woman in a newsagents today and I felt like vomiting from the stench of stale smoke on her... I can't recall smelling anything like that before.
I'm sure my nose will settle down soon and I'll enjoy food much more, but the smell of stale smoke on someone, that smell is just horrible and, as a 20 a day man, I sincerely apologise to any non-smoker who ever had to stand next to me.
-GaryC