Does anyone else has a weird sense of smell?

Or at least know why my nose does this.
I’m bored so I want answers.

So basically sometimes I’ll smell things that aren’t even there or haven’t even been present in a while.

Example: I literally just smelled orange chicken right now but I haven’t been near orange chicken in months. Or my mom will make pasta and I’ll smell freaking cheezits. Oh yeah and sometimes I can’t smell at all.

I literally thought everyone did that until my sister said it was weird.