Latest research shows that it isn't as unhealthy as everyone once believed to lower calories to 1000, and sometimes even less. It isn't mentioned much because it makes so many people cringe. But that's another thread!
However, at your weight I wouldn't think that is a viable option, because what happens when you lose 40-50 pounds? You can't keep dropping calories - not to mention that there may be many more satisfying ways to lose weight - i.e. More Food! Adding muscle mass will help you utilize your calories, and other tricks like smaller meals more often can help make a difference. Small differences add up! You don't have to lower your carbs drastically. Fiber is very important for the reasons you mentioned, plus for good colon health, heart health, and satiety. Low starch vegetables are very low calorie and very very good for your entire body and whole health. Jonny Bowden, a huge low carb advocate, has written a few books on low carb eating, and any of them might be good reading for you.
If it were me, I'd run as fast as I can to another doctor! I can't believe he refuses meds before he even has the bloodwork back. Many gynocologists are just as well trained with PCOS as endos are these days. A few years back everybody referred to the endos, but it isn't always necessary anymore, especially if infertility isn't an issue. If you do have PCOS, your doctor should be concerned about helping you lose weight to lessen your risk factors for heart disease and diabetes. Oh boy, I could go on all day here, but you got the picture!
Best of luck to you!