Someone called the RX in...is it now the pharmacy's position that YOU called it in and misrepresented yourself??
IMO, messing with someone's professional license and livelihood without just cause is pretty low; I also know it is done all the time...people sure can be vindictive.
I don't believe a reprimand on its own will harm your license...other than the reprimand may be published in a mailer to nurses and employers and may cause you to have to do some 'splaining on job apps. In Texas that is how RN reprimands are handled...perhaps your state is different however.
You might consider calling your local attorney bar association and ask if there is a nurse attorney in the area (RN JD). As a nurse he/she will be more likely to understand the issues. Usually the first visit is complimentary, so it's no loss. They are good people to have in your corner should you ever have to deal with your board of nurse examiners.
Good luck..sounds like you've got your hands full...hang in there!