I'm glad to hear you went back in for a re-test. This should give you much more insight as to what's going on.
If you're pre-diabetic, you might be eligible (and might need) a blood glucose meter anyway. This will let you see for yourself in a few seconds what your blood sugar is doing.
I might caution you to talk it over with your doctor before self-medicating. Anything strong enough to kill worms or other parasites is inherently toxic and could harm your own body's cells in the wrong amounts. I'm a horse person and we de-worm our horses every 2-3 months, but the kind of drugs you need to effectively kill of parasites like tapeworm are
very strong. One thing I do know with de-worming is that you need to know what kind of parasite you're treating for in order to choose the right treatment.
From a diet standpoint, I'm really impressed by the results raw foodists get when the diet is done properly. Have you seen the documentary that follows 6 people who kick all their diabetes medications in 30 days by adjusting diet & activity levels?
Sustainability and Raw Food Blog » Simply Raw - Reversing Diabetes in 30 Days : A Review
There seem to be many opinions about the cause of diabetes and IR. Some people advocate lots of meat or dairy, and then there are studies which show a link between animal products and blood sugar problems, so don't dismiss fruit/veggies just yet. If it were as simple as bananas causing diabetes, every gorilla would have diabetes. There is a lot we don't know about causes of blood sugar problems.
I hope you'll post an update after you see the doctor again. Hope you feel better!