Firstly, the faintness of the line should not be taken as an indication of your THC level.
If your test is like this:
Then two lines means negative, no matter how faint
the second line is.
Secondly, you should be aware that dollar store drug are not very accurate
. That's not to say that they're useless though. You should take into account that this is a cheap home
drug test, lab tests are generally much more scrutinizing. So if you take multiple dollar store drug tests and find that you're passing every time, I would take as an indication that you are either currently able or at least close
to being able to pass a lab drug test.
That "or" is important. Don't take home drug test results as a definite indication of whether you'll pass a lab test or not, take them as an indication that you may be close to passing. If I were you, I would still give myself another week or so just to be safe.