Oh, Gud. Many, many hugs, and what Fred and Hec said. You're in an almost unbearably stressful situation; even if you're not depressed, if it turns out that you and this doctor click together, at least you know you've got someone in your corner whom you can vent to, and who can help you figure out strategies for coping with this maze of twisty passages and how to find your way out.
What everyone else said, sj, with added hugs and teacups.
For some unknown reason I've been pondering askye's irritating cow-orker. My solution, because I am not just a colossal bitch but a colossal bitch in love with Ceremony, would be to do the following:
Next time you pass a toystore or five and dime, pick up a little toy trumpet. If you pass a craft store, also throw in a bag of silk rose petals.
When next the cow-orker asks to be announced, rise, click your heels, blow a tan-ta-RA! on the trumpet, and triumphally march her to the person she seeks, strewing rose petals in her path and bellowing, "OYEZ! OYEZ! MADAME [insert name here] SWEARETH HER UNDYING FEALTY AND DOTH REQUEST AND BESEECH AUDIENCE WITH [insert name here]. ALL RISE AND DO HER COURTESEY AS SHE PASSETH, OYEZ, OYEZ, GOD SAVE THE QUEEN AND ALL YOU GOOD PEOPLE."
Alternatively, if that's too loud, you could buy a pair of white gloves and bring a little silver tray to work. When Cow-orker asks to be announced, put on the gloves and proffer her the silver tray, saying in low and dulcet tones, "If Madame will be so kind as to present her card, we shall inquire whether Master is in to visitors, although we must strenuously warn Madame that we cannot make any promises."