ok so i havent done any form of weed for about 4months till last week but last thurs i ate some brownies havent done anything since but is there a way i could pass the piss test tomorrow?
Theres no telling because each persons body is different. Only way to know for sure is to test yourself with a home THC test, using the first urination of the day.

If you test positive on the home test, consider urine subbing (clean person or synthetic) for the scheduled test.