Even if the paint and treatments make your apartment look normal again, I don't blame you for being worried about mold. I know every county is different, but my friend's apartment had a serious mold problem and her leasing office is fine, but our county's Health Department would come out for free to inspect and write some sort of report proving that the mold was there, and was an issue. They were able to release themselves from their lease.
Sorry this happened
Hope it works out.