Hi Moon. This is not the best place to be getting legal advice and that's what you need right now...an attorney.
In the past couple of years, many states have given HOAs very strong powers within communities to foreclose on owners that owe the HOA back payments. Although they are not in 'first place', they still have a strong lien on your property and can move to get you out quickly, legally.
My best professional advice to you is to get an lawyer to represent you quickly. You may or may not have any recourse at this point, but an attorney will tell you what you need to do asap.
Real estate agents by law cannot give legal advice, nor should they try. Find someone local in Vegas that specializes in litigating against HOAs.
GOOD LUCK, I hope this works out for you.
Boca Raton, FL