needhelp21

I have a major problem.....I going through a child custody thing and at first it started off as negotiations with my daughters mom. She told me if I tried to fight it she would ask to get me hair tested. I decided I wasn't going to be strapped by the balls and so i'm fighting it. My question is I didn't smoke for a year and then starting in november I started smoking on in off probably a total of 4-5 times and only got really blown twice and it was mostly shitty shwag. Some people have told me to shave my head and I am actually willing to do that even though I love my long hair if that is my last resort. I also have some shampoo that from what i've heard from some friends actually works but the problem is its 64 buck a pop and it only last once and only for 8 hours so i would have to do on my court date and hope i pass. Is there any other methods or should I even be worried. Last time I smoked was last Thursday and my court date will probably be in 2 weeks or so. Don't tell me don't worry about it inless your are 110% sure otherwise give me so advice or solutions please.