If you are passing the home tests with your morning void now and you have 3 weeks to do, then you should be OK for the drug screen. The t line's intensity does not matter, if it can be photographed or photocopied then you are OK. Test you morining void a few more times, thc levels can flucuate and the day of the test dillute with 40 oz. of gatorade. It sounds like you will be ok.