Black mold produces irritating odour and it is a common characteristic of most molds. If you are a sensitive individual, this odour might act as an allergen. This irritating odour might aggravate or develop allergies and illnesses that you might not have experienced before.
Therefore, if you feel that your experience might be related to mold infestation, you should discuss your concern with your doctor. Apart from just causing allergies, it also produces a toxic substance which affects the nervous system and that is why it must be treated as early as possible.