You really should see a gynecologist. If yours won't listen to you, go to someone else. Having a doctor that doesn't listen is unacceptable. Ask some of your girl friends if they have a doctor they trust who listens to them.
When you do go in, be nice, but firm with the doctor if she won't answer your questions. Remember, you are paying her for a service.
Tell the doctor your history with the pill and that you haven't had a period since you stopped (more than 6 months ago). She should test your hormone levels, give you a complete exam, and ask you a bunch of questions about any other symptoms you may be having.