Ive been having left chest and shoulder pain, and now severe left flank pain possible kidney damage?

Im a 32yo female. Have been having problems for a few years, very vaguely. But recently Ive been having left chest and shoulder pain, and now severe left flank pain. My last bloods showed high creatinine levels but dr didn’t care. I have gone to another gp ans she has redone these but i don’t have results. I’m in so much pain and am on my own with 6 kids. First gp mentioned possible kidney damage? I pass urine a lot, I’m very thirsty, forgetful/foggy, so tired. I don’t know if its worth going to the hospital for though.