Air Purifiers

My chest really hurts. My landlord had cleaned the mold problem in my room. But I find it hard to breathe in there. But I also went a little crazy cleaning with chemicals such as tilex, a great value disinfectant, and I sprayed perfume because I still smelt mold. I haven’t cleaned the carpet yet or my stuffed animals, could the chemicals and my stuff be the reason why I can’t breathe well? Or is the mold in the walls?
I also have an air purifier with a hepa filter, should I change the filter?
It really hurts to breathe and Ive been in my moms room for now, but I really want to go back to my room.
I have the door open and a fan
still no hope
=/

I work in a small office and most people are very considerate, but sometimes we get clients/customers with perfume. Because of my migrianes, I'm extremely sensitive to the mildest perfumes. I've been thinking of getting an air purifier for my office. Any suggestions. Help…I constantly get headaches/migraines.