Phantom smells

Brandy
I've been smelling bleach for 3 days now. Everywhere I go, my house, the store, friends houses, everywhere. I can't get away from the smell. Has anyone ever been through this? My friends and family thought I could be pregnant even though I just had my period last week. But to make them feel better I took a test and got a BFN. I don't know what else it could be...