My workplace fucked my whole life because they thought I lied to them. I have proof, I didnt lie but it still gives me nightmares.

Due to the situation my step father complained about me, letting the basement (where I live) rot. I never noticed the bad smell. Even when I was out with friends or girls I have never noticed a bad smell or something. My friend and step father however said it smells like shit.

How do I know my ability to smell is normal?
Food tastes good but I'm worried I could not feel my taste is also impaired because I never knew how it is really supposed to taste