Environmental Analysis Inside House?

[Housey]

Has anyone undertaken such an assessment within their home or provide any advice in this area?

I have bad asthma (side effect of an underlying immune disorder...no, not that one) and it does seem worse when I am in the house, which I am a lot as I work from home.

I want to get a full analysis undertaken of my house internals for irritants and wondered if anyone can shed light on this or has experience of working with environmental companies?

 

[Housey]

I've had various tests for allergies but they show nothing. I sense we have an issue in the house, maybe dust mites or something else, so want to establish if this is the case or remove it from my investigations.