What does low kidney function and high CRP mean and should I be concern?

23f, not on any meds, don’t use substances, diagnosed with PCOS, height 5’1, weight 90kg and from Australia. A few weeks ago, I went to the doctors as I haven’t been having a period for 8 months now and I had a blood test done. Today, two things came back. I was expecting to be iron deficiency as I had a history of that but I was told my CRP is high and my kidney function is low but isnt a concern at this stage? I am having an mri in a few weeks but I’m noticing I am urinating a lot and becoming more sick like vomiting. Could this be kidney related? Could the high CRP be kidney related? I’m getting an mri of my brain to see if there’s a tumour or something for the symptoms I have been having.