Had kidney surgery 4 years ago, but first time to have high creatinine

Hey guys. F29. Recently had my labs done yesterday and my blood creatinine level shocked me the most, resulting in 129 umol/L or 1.46 mg/dL (clinic said normal was within 44-79 or 0.5-0.9). Shocked bc when my kidney was already bad a few years ago, my creatinine level was always always normal. I used to do biannual checkups back then. Idk what happened now :( it’s only been a year

Things to note though, i am much much more stressed now. When my blood was tested i barely had water (for several days i think), and consistently had bad eating habits for almost a month (stress at work).

I’m trying to drink more water and eat healthy now though. Worried this might be CKD idk idk