Here is my situation, what do you think?

I am a light smoker. I had about 4 hits Friday night (3 days ago) and a couple hits the weekend before that. That is all I have had in the past couple months.

Got a call today to schedule an interview, so now I am bit worried. I probably wont have to take a piss test for a couple weeks, while the interview process takes place.

I am pretty fat, 260lbs, from what I understand that will work against me in this, is that correct?

Any advice is appreciated, could it be worked out of my system in a couple weeks since I am a light smoker?