and still waiting

How long should it take to get biopsy results back? I've been calling the doctor's office twice a day this week, and they always take my name, date of birth, and say they'll get the doctor's nurse or assistant to call me, but I still haven't heard from anyone. Even if they call just to say the results aren't back yet, they need to call and let me know something. Getting a little frustrated here. If I wouldn't have to take vacation time to do it, I'd go to the doctor's office so I could go to the desk every 10 minutes and see if anyone could talk to me.