I had a hysterectomy 9 years ago (ovarian cancer but no chemo) and have since developed chronic migraines + headaches,
allergy to cat hair that was treated with
allergy shots over 2 years, and an exacerbated dust
allergy that did not respond to shots. My migraines involve great sensitivity to odours and sounds.
You are well within your rights to ask people around you (at work or school) not to wear perfumes because most of the new perfumes are chemical-based.