Sorry that you've not had good results from stopping your BP tabs, John. I'm no medic but I expect your high BP isn't related to your weight - as yours and your waist size clearly tell us that you are not huge. I think it is possibly the people who's higher BP IS related to their weight that have more luck when they lose.
For the record, I stopped eating "white carbs" overnight, back in July. I'd previously been a "carbo-holic" - I was doing Slimming World's plan and gorging myself on their Green days (eating unlimited carbs, limiting protein) but a chance remark on Minimins diet forum made me question the wisdom of my choice. All they said was "I don't eat carbs as they make me bloated and sluggish) I'd always had a tummy on me... I assumed it was just my shape, it was part of my classic pear-shaped ample hips and thighs! I had been attributing my sluggishness to being menopausal so for an experiment I gave up white bread, rice, pasta and potatoes. Just for a few days to see how I felt. In less than a week, my stomach was like a washboard (in ratio, I was still 2.5 stones heavier then than I am now!) and I was bouncing off the walls with energy. My night sweats, which had been waking me hourly, were diminishing already. I felt fantastic and I didn't want to lose that feeling. So initially I swapped to more complex carbs... brown rice, wholemeal bread etc.... didn't like brown rice at ALL, if I'm honest, but valiantly ate it for a couple of weeks with my home-made curry... but did forego the naan bread

Then I discovered cauliflower "rice" and I honestly, hand on heart, can say that I now prefer this over brown AND white rice. I can eat my curry and not feel bloated and of course it keeps the cals down. From this I progressed to courgette spaghetti too... lovely stuff. I do still eat tiny wholmeal submarine (27g) rolls from M&S but maybe I'll have one or two once a week with some soup.
I NEVER thought I'd adjust to life without a lot of carbs but I have. And more to the point, I don't feel like I am losing out on anything. Feeling so much better far outweighs the comfort of eating them.
BUT... we are all different and what works for me, won't work for everyone.
I think it is very admirable that you are so focussed on your body to try to work out what you can and can't eat and the inner workings. It must be frustrating watching other people losing weight when you seem to be stuck. Maybe just focus on thinking about the health implications that fasting must surely be giving you and see any weight loss as a bonus?
Since I've been 5:2'ing... and subsequently hit target a couple of weeks ago, I have also become a lot more interested in the science of nutrition... although I don't consider myself that much of a scholar so some of Carol's links tie my poor brain up in knots... but I do still try to read and grasp their concepts.
Keep going and stay positive .....