Kidney function is a strange one in my experience , I had a kidney function of about 25% for years and never ever felt any bad effects , over the years my function has eventually come down under 10 % ( last reading I had was 8% ) ,
i was at the renal clinic every 6 months which reduced to every 3 weeks as my function decayed
with regard food and drink there are certain things t avoid I suppose for me coffee was the main one , depending how much urine your passing will probably determine if you need to restrict your fluid intake , personally I have never has a problem passing urine as a matter of fact my mate says I’m full of it lol don’t think that’s a compliment though hehe. the one thing my specialist was keeping* an eye on was my potassium levels as poor kidney function can really affect p them . I am assuming you are under the renal specialist if not then I would advise a trip to the docs to get referred,
I never felt ill until my kidney function went below 10 % then I felt tired and struggled to walk any distance as I had cramping in my legs,I’ve been on dialysis for about 4 weeks now , to be honest it’s not a bad or uncomfortable thing to go through, you become part of a new “ family” where everyone is in the same boat . It’s 4 hrs a day 3 times a week , to be honest for me I enjoy it I see new people and get conversation , which seeing as I’m a carer for my partner with dementia it’s comes as a welcome break. Witch regard what to do I would say like everything try to stay fit , follow a relatively healthy diet ad try to keep positive it helps so much, personally I never ever worry , in that respect I’m lucky as my mother worries for the entire world . There is plenty of help for poor kidney function and following the advice they give you will help immensely , good luck and try not to get too stressed as it certainly doesn’t help