Help please... Welding fumes and my water fast...

I have a question... Today I am on day 12 of my 21-28 days water fast. Saturday starts my Welding Art class which goes on only saturdays and sundays for the next 8 weeks. Is that going to be a problem to my water fast since I will be exposed to some welding fume while in class? BTW, I wear a filter mask to filter some of the fume from the welding. Thank you. Tweet