I am assuming that you have tried talking to her? As the beneficiary you are entitled to a copy of the trust that may explain why she is not distributing the assets to you.. You may want to get a copy & review it before getting an attorney.
You may want to engage an attorney familiar with trusts and estate planning.
AVVO and the Nevada Bar Association can provide you with attorney referrals.
Before meeting with an attorney, send her a certified letter requesting a true and complete copy of the trust, unless you already have one. Keep a copy of the letter and the certified number, so you can track delivery. Give her twenty days to forward the same to you. If you already have the Trust, retain an attorney to review and advise you on your right to receive assets at this time. it is possible she has discretion to make distribution, alternatively, she may be required to make regular distributions. Impossible to say without first reviewing the Trust. Best of luck to you.
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Dara Goldsmith's answer to you is very helpful regarding how go go about getting a copy of the trust.
I can't tell from what you wrote whether you have a copy of the trust or whether your aunt is just not distributing trust funds to you. If you have the trust document, take it to a trust lawyer to review and advise you. Most trust lawyers to a free consultation in a first meeting.
If you don't have the trust document, as Dara G. suggested, demand it in writing w a certified letter. Nevada law entitles you to a copy of the trust IF you are one of the named beneficiaries (people who are to receive trust property). If you use a lawyer to write that letter, your aunt will probably pay much more attention to the legal consequences of not giving you a copy of the trust.