I started working at a top medical center 12 years ago. They didn't have a title for me. I picked one from the menu of current titles. Few years later, I asked

I started working at a top medical center 12 years ago. They didn't have a title for me. I picked one from the menu of current titles. Few years later, I asked to change it, two years later I got one. I feel like my title needs to be changed again.