I'm so sorry for what you are going through. I have a friend that was poisoned by mold. She worked for the CDC. She now lives in a condo and battles with them to clean up mold whenever she spots it or gets sick from it. She is hypersensitive now to mold and it makes her very sick.
Is it worth it to move back for your health? You can report them. Have you been to the http://www.moldwarriors.com
website or Richie Shoemaker's website? http://www.biotoxin.info?
I too have been poisoned and thought it was mold but it was not. GE and Bayer poisoned me and it is a product that is still being injected into people. Let me think about this for bit and I'll get back to you about some places you can go to get some help.
Be very wary about anything this woman Sharon tells you. She only very recently appeared at the Forum and has been posting a variety of patently false and misleading information.
While I have no information or knowledge of mold issues to share, I would think that you probably need to find a really capable tort attorney experienced in litigation. Separately, consulting an attorney specializing in real estate with extensive knowledge of condominium law would be appropriate.
The former might take a case on contingency. The latter is probably going to want an up front retainer which might very well exceed the amounts in dispute with the association.
While you may have linked the harm done to your health by the mold with condo fees payment issues, the law is more likely to view these as independent issues. Non-payment of amounts due may entitle the association to enforce its lien and to foreclose. The contracts probably also entitle them to attorneys' fees. They might be able to achieve this remedy even if you proved your counterclaims related to the mold issue, so I would be very, very wary about litigating over unpaid fees hoping that this mold issue will emerge as a viable defense.
While I do not know the amounts at stake or whether there is valuable equity in your property or whether you are also upside down on your mortgage, these are all factors that need to be carefully weighed in choosing your defensive avenue and strategy. Be very, very careful and be especially careful about following any suggestions made by this horrible woman Sharon.