I have this gas smell in my mouth?

This gas smell has been in my mouth for a week and I actually puked this gas smell in my mouth usually comes and goes I never drank gas I never poured gas in my mouth I was standing in front of the chain saw and few hours later I smell gas in my mouth for a week now I'm worried please help!! Don't comment if your just gonna say wash your mouth or u just drank gas I did NOT drink gas at all