Does drug test pick up pregnancy?

So I occasionally smoke weed, maybe every 6 months to a year. But smoke 4 days ago. And I smoked a day before that as well. Long story short I have a drug test for my job ( pre-employment) which is my first drug test I’ve ever had which I know I’m going to fail. Because i didn’t know I would have to do it so abruptly. So my cousins wife agreed to let me use her pee but the only thing is she’s 7 months pregnant does that affect anything or will the lab tech be able to know. How far along the just by her pee. ( btw if I wouldn’t known would’ve had to do a drug test I would’ve never smoked)

Please be judgement fee, I’m just looking for answers.