1yr+ shadows on wall behind dryer are actually black mold; intake ambient air = sporesin clothes. Allergy. Symptoms 3+mo. Cleaned safely. What are my risks?

Low risk. Black mold is problematic for people with definitive allergies to the mold but, if you're not allergic to the mold just being in the same room with the mold without disturbing the mold should not pose a health risk. There's a lot of hysteria about "black mold" perpetuated by companies that charge exorbitant prices to eradicate it...it's not a big health risk.