how can I now if my house is making me sick?

I've been sick for over ten years. I'v e been diagnosed with chronic fatigue, fibromyalgia, hppoglycemia, I get frequent infections. Over 10 ear infections, two of them were fungal infections. I have iron anemia, Something called P.O.T.s. Postural orthostatic taccycardia syndrome..which is another unexplained illness, causes low blood pressure and low salt levels..I have to take salt tablets to keep my BP up. OH and i was recently diagnosed with hypothyroidism..This all started years before that diagnosis though.
The thing is we moved into a mobile home about 20 years ago. I first started seeking help for illnesses about ten years ago but I felt tired and all before then it was just ten years ago that I said somethng is up.
The thing is it is a nice mobile home, not just a trailer. it has central air and heating. IT's actually quite dry in the winter because of the central heat.
BUt still I wonder about mold. SInce we have no cellar. We just have a crawl space under the house . So right underneath me is cement..We have siding around the bottom of the house but weather can get in..We have stored things under there but they can get slightly damp if not wrapped up tight in plastic cases. Well we took one out that was not properly wrapped and you could smell the moisture..I didn't see blck mold or anything but it smelled of moldiness.
ANyway, wE don't store much under there now but I wonder aabout the insulation under the house. I once found some laying on the ground and it seemed to have some white and maybe black mold..I have no way of knowing if it was but it was a black color.
I noticed it was under the bathroom...so am wondering if there could be mold in the insulation on the stuff that is still there.
The thing is I am on disability as I cannot work anymore.
I can not afford to have anyone come and inspect anything.

I saw some test kits in home depot but I heard that they weren't reliable...right now i couldn't even afford that. If i knew that they were reliable I would get them when I get a few bucks again.
I wonder if I should pull out the insulation under the two bathrooms..but I'M afraid if I do that maybe i'll make myself more sick. I mean I would cover myself and wear a mask but I'm not sure if this is a good idea, if it makes people so sick and if it is under the house I'm afriad of it making me sicker..
SO I really don't know what to do.
I was hoping someone might be able to help..I have very litle knowledge of this stuff. Maybe this isn't even an issue for my house but I feel I'm sick and I should at least ask about it.
ANy help appreciated.
Sue Tweet