Mould Toxicity testing

[ZenAlex]

While continuing my investigations a few people mentioned mould.

I have looked around my flat and the only place I see any mould is lines of it in between the tiles in my bathroom. Other than that I cannot see any significant mould anywhere else. 

1) Is there any device you can use to detect presence of mould in your house if it's not visible.

2) Are there any remotely reliable tests for mould toxicity in your body? I've seen ones such as the urinary mycotoxin test, but not sure I have faith in it. 

[ZenAlex]

I do notice that when I've spent more time outside my eyes feel less stingy and my sense of smell is better, but not massively so.

Could be dust, could be mould.

Getting more fresh air into my apartment helps but nothing ever gets rid of it completely. 

I have an air purifier with a hepa filter which sometimes seems to make a slight improvement, but also sometimes seems to aggravate my throat a bit, doesn't matter how much I clean the filters.