I have not smoked since monday at noon and have a serum contininte and nicotine test on friday. will i at least pass as second hand?

It depends: If you go in with dilute urine having drank a lot of water I suspect you'll be fine but that's only a guess because I really don't know for sure how long the metabolite of nicotine can stay around in the urine. My best guess is 48-72 hours but it's just a guess. Bottom line you stopped smoking. Congrats..now the real chore is to get the support etc...to keep at it...not easy to get past 6m.