I work for a Plant nursery in Oklahoma... I am a office employee... I do not do piece work, I am not seasonal, I do not work outdoors with the farm hands, I am paid hourly, I do not make near $455.00 per week, HP says I am exempt from being paid time and half for overtime... only get straight time. Am I being cheated

Call your local Dept of Labor. Oklahoma Department of Labor - ODOL Homepage

Afraid I will loose my job, if I do that.