You have tried the small bites every 15 minutes thing?

I don't know anything about PCOS, and it seems that perhaps you should consult with a doctor or nutritionist who specializes in the effect that may have on your system. However, if you do have a sugar tolerance issue, what about trying some lower glycemic index type foods? Whole wheat bagel with PB only, for example (instead of white bread with PB and jelly), or Turkey sandwich on wheat bread, eaten a bite at a time every 5 minutes or so. Also balancing things out with some other sources of protein and fat - nuts, for example. I see you've tried "protein bars", but I am talking protein in a more non-process version. Many bars have added ingredients in them which may be contributing to your symptoms - so start simple, with the basics to see if you can narrow it down to something that works.

Some of the items you listed as having from your SAG stops sound like WAY too much sugar even for someone who doesn't have an insulin issue (twinkies, poptarts, etc.) Even pretzels, while great for salt, are just quick absorbed white flour.