eternalflame-You CAN do this. I also have numerous health problems. I have Parkinson's Disease, only one kidney, I had a stroke in 2009, followed by numerous seizures. In 2004, I had my first brain surgery, followed by 3 others.
I was 100 lbs. overweight and lost it in 10 months times. I have maintained it for 18 months. Like brandis said, it truly is about getting your head right and telling yourself that no matter what your health issues are, they will be SO much better without the extra weight. That's what happened for me, and believe me, it wasn't easy. I will never say that it was. However, when I finally was so sick of being sick and fat, I knew that I could do something about the fat, and so I did, no excuses.
I know you can do it too. You must keep a positive attitude and look only forward. There are many people here who have serious medical issues who have managed to lose and maintain. I have seen several with PCOS who have had great success.
Best wishes to you and many