Answered on Apr 15th, 2019 at 6:40 AM
The answer to your question turns on whether you meet the requirements for an exemption to the overtime pay requirements of the federal Fair Labor Standards Act (FLSA). If you are exempt, your employer is not required to pay you overtime pay. Further, absent some industry-specific regulations, in general there are no limits on the number of hours an employer can require you to work.
Whether or not you are exempt depends on a number of factors including whether or not you are paid hourly or on a salary basis, whether or not your compensation is subject to increase or decrease based on the quantity or qualty of your work and what job duties you regularly and customarily perform. So the determination of your status as exempt or non-exempt is one that can't be resolved in this forum. That said, my quick search of several sources on the subject indicates that RNs are often considered exempt under the Professional exemption to the FLSA which also covers doctors, lawyers, accountants, engineers and other for whom advanced education is required for the job.
You can get a definitive answer to that question by visiting with your local US Department of Labor Wage & Hour office. There is one in all of the major Texas cities. Dallas and Ft. Worth share one located in Arlington.
If you are exempt and the work-load situation you describe appears to be a permenant condition of that position, consider using your remaining time there to look for another job.
The forgoing is for general information purposes only and does not constitute legal advice or establish an attorney-client relationship.