Need some peace of mind

Ok, I know that people who know about this kind of stuff are probably getting sick of all the questions like this, but I promise I'll never do it again!

I had a drug test this morning for school. I'm stressing about it, even though I know what's done is done, it's over, I can't change it, all that. But I've been getting conflicting info from other threads and from people when I ask their opinon on my results, which I'll find out tomorrow. Here's my info:

-Female-
Age: 22
Height: 5'4"
Weight: 130
Metabolism: I'd say medium or fast, I take adderall (I have an rx) so my heart rate is usually pretty fast, I exercise 3x/week too, so...

Onto the smoking:
I cut down to a few bowls every weekend from November-January 08
I quit January 10, stayed clean until March 18
Smoked one bowl March 18, about 2 joints March 20 & 21, and about 3 hits on March 27. All the weed was mid-grade.

I drank a lot of fluids the 28th-2nd but was really sick & dehydrated over the weekend. I choked down a bottle of water yesterday and drank 20oz H20 and about 16oz of tea before they popped the test on us. It was my 2nd pee of the day & I did the standard midstream lol.

Most people have been telling me that I'll be ok because the last amount I smoked wasn't that much at all... I'm still worried. I've looked here, at erowid, and other random places, but I want some human opinions from fellow smokers.

Oh, I also took a First Check THC test when I got home (about 7hrs later) and it showed up negative. A very faint line, but negative. Will that hold for D.O.T. testing (whatever that means...)? Any help will be very appreciated.

Not that I can undo it if it's wrong, I just want to sleep easy tonight...

Most home tests use the DOT cutoff level of 50 ng. So if youre passing your home tests using the first void of the day, you'll pass the DOT screen anytime.

Nursing school teachers are sneaky...

Apparently one of my classmates went and had a talk with them and told them that I had gone and smoked during lunch after our test. I didn't. But, like I said, I'm sick. I've only been sleeping like 2hrs a night because of this nasty cough. So my eyes have been red as hell the past few days. Yesterday everybody was making little comments about them & I guess someone ran and told. This morning we had another drug test. I'm pretty sure that they would've saved that money if I hadn't passed the first time...

Thanks for your help, Burnt Toast. I think I read another one of your posts on a similar thread & that was what really calmed me down before I read your reply to mine. I appreciate it!

I'll post again if I end up having failed lol.