How can i know if my rights as a patient have been violated by my employer

I am an employee for a large respected private hospital. I recently recieved treated in the Emergency Room, where I am a clerk. I was having neck spasms while I was working, and decided to seek medical treatment during my lunch. I clocked out, received treatment and was released all during my lunch. Hospital policy states that an employee must be off the clock when receiving treatment. Which I complied with. Two weeks after, I was approached by managment, questioning my actions on this particular day and questioning my visit to the Emergency Room while I was on the job. Because my visit was work related and because I missed work a day prior, I obtained a doctors note and submitted it the Employee Health Department. I felt violated due to fact that I was even questioned , because my employer apparently had reason to believe I was a patient while on the clock. Can they request times from me. They are wanting to know the actual time I was checked in, treated , and discharged. The problem is , I was physcially checked in, treated, and released all during my lunch. But the Nurses did not acutally discharge me in the computer system until an hour later, after they documented., but I was physcially gone and did not received treatment thereafter. How am I protected, I have feel violated.