Can people smell it?

I have a back molar that is cracked and I think rotten (it smells and taste weird) I can sometimes smell it if I stick my tongue in the crack but I have good dental hygiene (just bad genetics I guess) and chew gum ALL the time.

I’m pretty self conscious that people may be able to smell it???? Do you think they can? Because when I chew gum I can’t smell it at all and after I brush my teeth I can’t smell it, just sometimes.