Even though you quit smoking on 4-1 and were clean a week before that, you probably weren't actually clean. I got real lucky and hadn't smoked since like March. Well the weekend of June 25th I smoked on Fri, Sat and Sun, I went to a local headshop and bought 8 tests for $20. Started testing myself Monday, and Tuesday they started coming back clean. Don't ask me how. I am 5'2, 108 lbs. I do have a fast metabolism but like everyone says, everyone is different. I just completed my counseling today so I know that my UA came back clean. I wasn't sure if I was going to have to dilute or not, thats why I bought the tests. I would suggest going to buy some tests, they have them at Walgreens too, but its like $15 for just one. So if you are able to get to a headshop they probably have em. Start testing yourself and if you have to dilute, use Fare Thee Well Now's dilution method. I was going to but luckily didn't have to. I'd be careful about the interview though, I was sent immediately after my second interview to go test. Good Luck, hope this helps