I've been back on T for 2 1/2 weeks now, and right before my last shot, the third one, I got my period. Most likely, I figure, if you've ovulated before getting on T, all that junk has to go somewhere, so you'll get a period regardless of T's influence.
However, I absolutely agree with Eryk. If you're paying to see a doctor who's overseeing your transition and is supposed to be helping, she should have your best interests in mind. I don't know about you, but for me, menstruation is the biggest problem for me in terms of dysphoria. I've never had one past the first month on T, and I assume that on a full dose, it should stop... though, as Jay said, some people might have different reactions.
I'd advise finding another doctor. Obviously your body, being genetically female, was made to menstruate. And obviously, as a transsexual, you don't want that! If your doc isn't more understanding, she's doing you a disservice. Find someone else who actually knows what a transsexual is, and will give you what you need.
SD