For breakfast I tried Greek yoghurt with fruit but that didn't agree with my stomach and my bg didn't come down change, so have gone back to weetabix. Lunch is brown bread sandwich with fruit and dinner is meat veg and small portion of potato. Snack on fruit. Drink plenty of water. Sometimes at bed time my bg is 3-4 but high again in the morning.
I'm sorry, but that's a LOT of carbs... Weetabix? Might as well have a sugary coke in the morning. (Yeah, it's that bad). Diabetes is a progressive condition, unless, and
only unless, you change your diet to include less carbohydrates. They all turn to glucose once ingested. So that's bread, spuds and cereal as well... Don't get me started on fruit.
If the yoghurt doesn't agree with you, how does eggs with bacon sound? Would that be do-able? Salad for lunch with tuna, warmed goat's cheese, bacon or salmon? In the evening, just have more meat and veg, skip the small potato.
It's really "just" a matter of adjusting your diet. T2 doesn't have to be progressive, it doesn't have to get worse with more medication and eventually, insulin. Here, have a read:
https://josekalsbeek.blogspot.com/2019/11/the-nutritional-thingy.html I might have shared it with you before, but might be useful as a refresher.
It's not hopeless and you're not doomed. But you do have to take some action, sooner rather than later. Mind you, with gliclazide you really have to test your heart out because if you cut carbs drastically, your blood sugars will drop like a stone, and hypo's are no fun.