Help Eggbert Recover

Hello! A couple of weeks ago, I took our cat, Eggbert, to the vet for what we thought was constipation. We ended up finding out that his kidney was three times the size it was supposed to be, and he started a round of antibiotics to help bring it down. At his check-up, we found out he had nephritis, which is uncommon in a cat his age. After the first round of antibiotics, it still hadn’t cleared up so he needed to continue the antibiotics for another week. Unfortunately, he has been up and down during recovery, and right now, it’s pretty downhill. He has taken a huge dip. We are worried that he might need to visit an ER soon. We’ve spent as much as we could for vet care and medicine, as I’ve completely maxed out my CareCredit card, but to continue the care, we need help. Every penny counts, and we would be grateful for anything. We just want to see Eggbert feeling better.