Nan is right, you will find the schedule that will help you get through the ups and downs of getting enough nutrition. That will help with the low blood sugars.
And I agree with Jill, too. The low carb and high protein diet after surgery was the END of my insulin resistance. That and some thing happens when they bypass the duodenum that helps with diabetes, too. I was on Metphormin (Glucophage) for a year before surgery and left the hospital not needing it...there is a lot of research going on right now that is trying to explain this phenomenon of taking away the Insulin Resistance, Glucose Intolerance and other types of diabetes symptoms with the bypass part of the GBP and the DS and we should get some answers soon.
Concerning My PCOS...after surgery it has improved greatly. I was lucky not to have the 3 month TOM that some do have after GBP. It's more common then I thought apparently...so I AM lucky. LOL Some older women have called my Dr's Nurse saying that they had been in Menopause for a few years and start up again after surgery...blamed her. LOL She's too funny about it!

My TOM did become more regular. No pain at ovulation and my PMS has been manageable, down right good, sometimes I don't even know my TOM is coming until it arrives!
My surgeon was all about me taking my BC pills because "you just CAN'T get pregnant right now!" LOL I'm single and not like that, so there isn't a question for me...

but there are a lot of people that have this surgery to help relieve their PCOS so they can get pregnant.
Hope that helped.
Angela