The only sane answer is to get a lawyer. You shouldn't attempt your own brain surgery, either, and this is about that category of case.
I agree. With these sorts of serious allegations, it is a good idea to obtain counsel to best represent your interests. At the very least, you should seek a consultation with an experienced custody attorney to more fully explore the facts specific to your case and provide you with detailed information.
Although I agree with both answers, you may also want to contact the Legal Aid Center of Southern Nevada and determine if you qualify for pro bono services. Another option may be to borrow money from family and friends to cover the legal fees. A case like this screams for an attorney to protect your interests.
I don't understand why you wouldn't do everything in your power to get the resources together for a lawyer. There are extremely serious allegations going both ways.