I have sound and smell issues. My family will tell you that at times (AND NOT ALL THE TIME) no really.....lol. But at times they swear to you I have theauditory and scent-ability of a K-9. When I don't feel well? I don't think that they are heightened, but on the rare occasion that I'm getting sick? Look out. Everything is magnified. Especially sounds.
If I'm getting a migraine? I'm intollerable, or rather everything else is intollerable - and that includes vision - lights are ridiculously bright. I've often thought it would be interesting (science wise) to be hooked up to some machines - MRI, EEG, PET scan the second I noticed a hint of migraine.
I can tell you this (and it's gross) when I tell you I can smell extra ordinarily well - it's a curse. About two weeks ago I caught a whiff of something dead in the den. Just a faint hint. I told DF and he dismissed it. He jokingly said "What do you think it is 'oh sniffer of sniffs'?" and I said "I think it's a dead mouse." Well far be it for me to get the rodent wrong, but three days later I came out and said "Whatever is in the trash? Needs to go out, NOW!" and he got up and took both cans outside. Didn't help. Came back through and said "It's still here." I left the room, he moved a table, and a rolled up rug, and a cooler and behind that? Found where the cat had brought in a mole. - Had to be yesterday, and he was amazed. I told him - death has a smell.
So to answer your question - Yes, I believe her when she tells you things smell and she can smell them and when she's sick - it's worse. Unless of course her nose is plugged. Then I think it's just being irritable all over. But before that? I would bet anything she's not faking at all. The sound of a potato chip bag can send me right over the edge, DF holds receipts in his hand and fiddles with them - and that noise alone makes me absolutely nuts. Just folding paper makes me want to ----take it from him and put it down. Scuffing slippers, popping gum, squeeky wheels, out of place sounds - all - I think it has something to do with possible adhd - not sure. It's also not all the time on irritating sounds too. But smells? ALL the time.
Hugs -
Star