Wa Aleykum Selam,
Sister can you not find your answer in the Quran and Sunnah? This is where we look for judgement, and if you do not have an Islamic Judge, find the next closest thing such as an Islamic Scholar or Imam to help rectify your situation or at least get a more Islamic opinion on the matter. If you are in some kind of legal battle with a non-Muslim for example, then you are forced to use the legal system where you live, there is no other choice unless you wish to take down the government, right? Hopefully you won't be wronged, most things are common sense and you can just use county mediator before having to got a judge or form a lawsuit. You should look that first before seeking a law suit if you must use the secular legal system.