So confused by all the medical stuff and depressed by the situation.

I had 3 blood tests between Feb 2024 and May 2026. My eGFR dropped from 70 to 58 to 52. The doctor confirmed CKD stage 3a.
This was a huge shock to me. I went from living a fairly carefree life to thinking I might be dead in 3 years. So I've been in a real slump for the last few weeks, just sitting around all day doing nothing.
On the plus side, my sleep pattern changed from 6 hours a night to 9-10 hours.
I just took my 3 month re-test a little early because I couldn't stop wondering how serious the problem was. The eGFR reading came back as 76.
Is it normal to gain 24 points just by adjusting diet and medication?
After I got diagnosed I cut back salt to 2mg a day, stopped eating meat and processed foods and I cut my Aciclovir prescription down from 800mg a day to 260mg a day. And I try to drink more water.
I've suffered with chronic lower back pain for decades but in the last 2 years it got a lot worse. I believe that was kidney pain. It got slightly better since changing the diet.