Woa! Juice?! No, please, no juice!
Your numbers are looking pretty good, and that'll have more to do with your lowering your carb intake than with the metformin. You could drop down a bit lower, maybe? I've just had a very filling breakfast/lunch with about 3 or 4 grams of carbs, that's a can of tuna, mayo, two eggs, capers, olives, and an excellent goat milk-based cappuccino, as cow dairy doesn't agree with me. I won't feel hungry until dinner, or well beyond! Only reason I eat around 5 is because my husband'll want his grub. I could go without longer. just an idea... I think if you get your numbers a TAD bit lower, you can discuss going off met with your doc... You're just a hair's breath away, from the sound of it.
Back to juice: assuming you mean fruit juice. Fruit is jam-packed with sugars (fructose and glucose). That's why the bulk of us avoid all of it save for berries, tomatoes, starfruit and avocado. Vits and mins can be gotten from extra veggies or (organ) meat. Anyway, lots and lots of sugar in fruit. And if you eat the fruit whole, that's bad enough. But if you have it juiced, all the fibres are shredded... And that means they don't slow down the uptake of the sugar in your bloodstream. You'll go VERY high, VERY fast. Don't bother checking bloods 2 hours after juice. Test half an hour afterwards and you'll be in shock. About 2 years after diagnosis I was well on my way with low carb, and during a show's intermission there were drinks... Only things left to choose from were wine and juice, and since I'm rather teetotal these days, I went for the OJ, as a one-off. Within five minutes my heart was racing, my cheeks were flushed and I felt absolutely dreadful. Like I was going to drop dead on the spot. (Could thankfully go back to my seat, but really? I just wanted to go home!). Also.... Fructose is regarded as a toxin by the liver. Not good if you have non alcoholic fatty liver disease and don't want it to get worse.
Just something to consider. You're better off with tea, coffee or water. Or hey.... Cappuccino.