Banana's and apricots are a T2's kryptonite, pretty much. If you lack potassium, why not just supplement with, you know, a supplement? Still reap the benefits and no spike to show for it to boot. Less tasty maybe, but it won't send your blood sugars into the stratosphere. As for keeping things moving, something fermented that's less carby could well do the same, say, that lovely full fat greek yoghurt with some psyllium husk tossed in, if you can tolerate that. I add coconut to mine, and/or blue berries (or the rare strawberry, if we have them), walnuts or cocoa powder. Almonds and cashews are a little carby-er than say, walnuts, macadamia's and pecans would be... And I don't know how long you've been on metformin, but that can cause rather bad muscle cramps as well, as with long term use often comes the inability to absorb vitamin B12 efficiently. (Which can make your calves go absolutely bonkers.). Not a fan of the pasta and rice, but when it comes down to it, I do think the fruit is more damaging...
I hate to cut this short, but we're off to bed for the night. Hang in there, and listen to your meter.
Good luck!
Jo