Welcome, you are off to a good start. I don't have an answer to your question, but you can buy a glucose meter cheap and test your blood sugar and your reactions to different foods to see if it is normal. For more info on what is normal and how to test go to http://bloodsugar101.com/I have been on Implanon (progestogen only implant) for the last 6 years. I read that it is linked to insulin resistance and the product information brochure actually reads: "may induce mild insulin resistance and small changes in glucose concentrations of unknown clinical significance" and warns that diabetic women should be monitored if using Implanon.
Hint - TrueTest meters from Walgreens are cheap and sometimes come with a 100% rebate. Test strips from Amazon are half the price.http://www.amazon.com/TRUEtest-Test-.../dp/B002CGT09C. Get at least 50 strips.