laid off, then hired...PLEASE HELP

i was laid off 2 weeks ago. i didn't think i would land a job so quickly.

here is my history: 40 yr old male. 5 10 and about 190lbs. been smoking everynight for 2 years. last time i had some was a joint last night.

this morning i get a call that some company wants to hire me. they said they will send me stuff on wed.. i then have to take a drug test w/in 48 hrs of getting the notice. i'm screwed.

all the stuff i'm reading about this seems contradict each other. some say the solutions don't work, water does not work because thc is stored in fat and not water soluble, some say this product will work, other's say the opposite.

is there anyone who can help me? i need to know what to do, but i don't want to waste money on products to "clean" my system if they don't really work. (drug testing is big money business, but so aren't the products that claim to flush the system.)

i'm so confused and broke. please help.