What can you do for ongoing symptoms after black mold exposure? is there any long term health concerns from extended exposure? my symptoms currently include really bad congestion & sinus headaches, runny nose, feeling really tired & chest tightness?

See a GP and specialist for an evaluation (CXR, spirometry, allergy tests, home assessment). Nasal and lung treatments can help allergies&asthma. Most people recover fully. Very few have autoimmune or nerve health issues https://pubmed.ncbi.nlm.nih.gov/32088666/ https://pubmed.ncbi.nlm.nih.gov/19854819/ https://pubmed.ncbi.nlm.nih.gov/31608429/ I hope you feel better soon