Ideas for taking action against possible toxic mold?

I have widespread health problems and have always believed it could be due to toxic mold in my home. I pushed for my parents to investigate and look into this a decade ago but they are the kind of people who would rather sit and ignore a problem and remain in denial/disbelief rather than fix anything. When I have lived elsewhere I did far better, though not completely. Currently I am a poor student and unable to work with my debilitating health problems so moving somewhere else is simply not an option right now.

All of our health (my mom, dad and I) has declined over the years but they won't believe it could be mold. When I first started getting really sick in about 2004 toxic black mold was the first thing I thought it might be. We have some cracks which are growing in our downstairs ceiling. I am practically certain it means we have leaking pipes running to the upstairs bedroom. Does this seem like it might cause toxic mold? and that it has devastated all of our health?

Any ideas how I could try to force my parents to look into this? That sounds kind of pathetic I guess, (lol) but I welcome any ideas that could get them concerned. They simply will not care (or believe) and are not rich enough to waste thousands on paying to fix piping or mold specialists or any of that. I wonder how many people out there end up in these kinds of situations and instead of finding a solution or redistributing funds they just allow themselves (and their poor families) to die slowly.

Thanks for reading. All ideas are appreciated.