Some describe it as “tinny,” “metallic,” “ammonia,” “blood-like,” “blood
in the
mouth,” bitter, or some other odd smell or
taste. This smell or
taste is not related to something you’ve eaten or from your environment. Most often it has no rational explanation.
So that could be most likely just a form of a panic attack but since you said you are on meds I would report this to your health care provider and have them look into this. It could be a side effect and you need to ask a professional.