I'm sorry you are going through this. I don't how extensive the abnormal area is, so I can't tell you how many biopsies you should have had done. Personally, I'd want as many biopsies as necessary for better accuracy. However, before you let your doctor do anything, she needs to show you the lab results when they come back and discuss it in great detail with you so that you know what kind of dysplasia you have and how extensive it is. Then she should discuss the risks and benefits of all four methods of partial amputation with you because they each have them. That way you can make an informed decision. That's the key word: informed.
If she won't show you the lab results and keeps pushing one method of partial amputation on you without a thorough discussion, get another doctor. You need to know exactly what is happening and you need to know all your options.
I'm disconcerted that any doctor would tell you it was okay to skip yearly PAP smears. I would have fired that doctor and hired a new one who took my health more seriously. When I didn't have health insurance, I went to a free city clinic.