A legit broker should have been able to give you an estimate pretty quickly and should have provided you with a TIL disclosure document.
The fact that this broker is sandbagging you and making you even MORE nervous during a naturally stressful period in your life is certainly indefensible and bordering on criminal if she’s hiding something from you.
And, for her to start yelling at you? I’d have told her to eff off right then and there. There’s not reason to put up with that kind of bullcrap considering how much you are paying her to be treated like that.