I work as a pharmacist, and sometimes it bothers me that i keep on repeating reading the prescription over and over again just to make sure i understood it correctly. i'm i suffering from anxiety or ocd?

Being a pharmacist is a stressful and responsible profession. To a degree there has to be some repetition and checking. The time that this passes into a realm of illness is if it begins to hamper your work and you cannot complete your work day.

You sound like you are very conscientious and want to be sure you don't make a mistake because your actions make a difference in the life of people.