How Long Does Suboxone Stay In The System?

i have been at a suboxone clinic for a month and a half, i take the film which is 8mg- 2 mg sl a day, i have my appointment 7 days from now but i have just a half a strip left, if i take it will my doctor be able to see it when he gives my my urine test in 7 days?,i cant afford for it to be clean, please help