Hi, questions, low, hi bm's non diabetic

Hi I am used to having very low blood sugars such as 1.2 due to a condition which leaves me unable to eat for many days or sometimes weeks. This leads me to needing nasogastric tube feeding and glucose drips.

Lately though my sugars have been going the opposite way and I have been getting readings between 10 and 21 and dont feel to great at times as a result!

I feel very headachy, dizzy and generally unwell and a little confused. I obviously have nothing I can do to bring my sugars down unlike when am having a hypo we.can bring them up a little bit.

I am disabled, as i read somewhere about exercise, which is something I can't do as I am stuck in bed at the moment due to lack of competent carers.

I am having issues with my kidneys at the moment and wondered whether that could be causing the issue rather than it automatically meaning I could be developing diabetes. Could this be a possibility, do you think?

I just wanted some general advice to see if there is any else i can do to try and keep my sugars low and when they get high to try and bring them down as they can rise above 10 even when i haven't eaten for many hours which Is what is making me think something is wrong.

Thank you for any advice you can give.