Drug Test Question

I was told that I passed a urine test by the practitioner that I was almost certain I failed. I managed to take some preventative measures before hand, but I still thought I would fail. The test was instant, she took the cap off and dipped it in the sample and about 30 seconds later she had the results.
 
I didn't get a good look at the test itself, but most of the white strips were pink to the top and on the one all the way to the left read 1 2 C vertically with C being the highest on the strip. That one went pink to just above the C by enough for me to be comfortable that it was over it.  I know that's pretty vague but that's all I got.
 
She told me I was negative and good to go. I said good to know and left, but now I'm wondering if she lied to avoid me causing a scene (even though that wouldn't have been the case...). I'm just worried I'll find out in a couple days that it really came back negative and I'm sh!t outta luck.