That sounds really distressing, I'm glad that you got to experience things coming back.

I struggled during COVID because of how my sense of smell changed. I could still smell stuff, but some things were different. My body odour, for example, smelled different. At first I thought that illness was causing funky swear smell, and then I thought it was poor hygiene for an extended period making me smell extra funky (my best friend died, I was a grief blob for a while), but eventually I realised that it was a perception issue, not a sweat issue (onions also smelled bad).

I hated it because for months afterwards, it felt like I was being haunted by COVID. I can also relate to what you describe, a sort of "epistemological anxiety", where being aware that your perceptions are not to be trusted throws you off balance in many ways.

What's your favourite smell?