WHAT?!!
That is completely uncalled for. OMIGOODNESS

I would throw a fit if they did that to me. How dare she treat you like that. I believe every dr.'s office has a sign posted somewhere about how patients are to be treated with the utmost respect and conscience and it does not sound like they're doing that. That doctor needs to know what her assistant is doing.
I would call the Dr. and DEMAND for HER to call me back.

I hate those snippy phone nurse wannabes who are sooo nosey they always ask what you're calling about just to know. I've gotten to the point where I say "I'm calling about a matter that I'd like to discuss privately with my doctor, so I'd appreciate it if you could have her call me back", they're always so pushy: "but what should I tell her it's about?" "just tell her I really need to speak with her as soon as possible, it's very important, thank you".
It's YOUR body, and you should put in it what YOU see fit. No ifs ands or buts about it.
Sometimes we have to take our healthcare into our own hands.
Please don't take that crap. It is their DUTY to treat you with respect and do anything and everything to ensure you're happy and comfortable with what you're taking.
Don't speak to that loser bag again, it's between you and your doctor - stand your ground and demand to be treated with respect.
aaargghh!! Good Luck!!