I used to be a very heavily weed smoker and I had court. They gave me 3months till I come back in for the test but I took a hit two nights ago and my court date is April 4 other than that I've been clean do I have any chance in passing?

I think you already know the answer to this question..

You posted this on march 10 if you get tested on April 4 you are fine because that's about a month, unless you are a heavy set person with a sloooow metabolism. Otherwise you can pass in a week if you only took 1 hit. Even if its chron

It's a hair strand test right? Not urine or blood. Metabolism will have no effect on the results.
http://www.trimegalabs.co.uk/questions/hair-drug-testing-explained.php

Oooh I wasn't paying attention, yea hair is different but it will probably be such a low amount of thc it won't be traceable

A single hit following prolonged abstinence is not going to show on a hair test.

It is possible, at 90 days, that there could still be THC-COOH in the distal portion of hair strands. While it is claimed that they check 1-1/2" that measurement is imprecise and influenced by collection method as well as individual hair growth rate.

Were you tested at the beginning of the process, either urine or hair?