Please help, my house is making me sick and I don't know why

[Andre Crabb]

Hey BP,

So I bought my first property last year in Tampa, FL. Its a SFH with a half-converted detached garage in the back.

Pretty soon I realized that I have health issues when I'm in the home, and it seems to be related to when I run the AC. But when I'm working on the detached garage in the back I also have problems.

There's a few things I think it could be related to: mold, rats, termites.

I don't see or smell a lot of mold - there was some in the AC handler which I cleaned what I could see. I've fogged the house with several different solutions for this as well.

Rats had definitely infested the attic and the garage at some point before I owned the house. I know the ducts leak attic air into the house so this seemed like a cause. I just had all the old batt/blow-in insulation removed and replaced with spray foam, but I'm still feeling the symptoms.

Termites have been all over the house, the attic and garage was full of their frass which I've been starting to vacuum up and clean. But I'm not sure if people get sick/symptoms from termites.

What's worse is now I feel similar symptoms when I turn on my car fan / AC - and that makes me think its back to mold being the problem.

If it is mold, I'm thinking I'll have to replace my AC unit (20+ years old) and al the ducting (probably about the same age). But that's a $10k+ bill and I still don't KNOW if its going to solve the problem.

I could really use some help here.

I've had several professionals comes to the house and a lot of them say conflicting things, so its all been very confusing.
I bought an air particle counter and that didn't show anything bad.
I use a MERV 14 filter for my AC system intake and have a small HEPA air purifier in the house.

Not a great experience with my first property, but I'm learning a hell of a lot.

Thanks