Other than the blood pressure, you sound like me in 2008. I was diagnosed with diabetes more than 15 years ago, and for a long time, I was able to keep it under control without medications or insulin just by using my glucometer to gude what I ate and what I avoided. But by 2008, after a surprise late-life pregnancy, nothing I was doing was making any difference and my blood sugar was rising despite medications and insulin, my cholesterol was out of wack, and I had arthritis that kept me largely immobile. (Not literally, but when it hurts, we find ways to avoid doing it.)
My doctor has now proclaimed me "cured of diabetes" because my hbA1C is 5.2, down from 5.7 earlier this year with no medication or insulin. Now, I don't think I am cured, because if I started eating SAD again, I know my blood sugar would rise again - but 5.2 is a prefectly acceptable blood sugar and I'd like to keep it brtween there and 4.7 for the rest of my life. My cholesterol is also back where it should be and my arthritis is gone. I can now walk 16 miles or more a week and love doing so.
As many other have said -- try it for 30 days and see how you feel. You really have nothing to lose - if you feel bad, or your blood sugar reacts badly, you can always stop.
Grain Free since 2009, WP from 2005
~100% primal (because anything less makes me very sick)
Goal: hike across Sweden with my grandchildren when I retire in a few years