Help !! Too much sugar

Hellooooo guys

I think I made a big mistake, I have a uti and my doctor said that I should drink 1L of water in an hour to partly get rid of it. So I thought what a good idea it could be to drink a whole bottle of cranberries juice ? I now feel bad, tummy hurts and I feel like vomiting. It contains the equivalent of 18 sugar, 110g and a bottle of coke contains 38g so you see the problem here. I am diabetic. But god I am freaking scared of the consequences. It is night in France rn and my mum just said that it was a bad idea. I need help 😷😷😢😢😢 thanks !!