Anion levels at zero albumin is at 4.4 w/follicular NHL.

Blood work showed anion at 8mmol/L 3 weeks ago. Now I'm at zero & albumin is steady at 4.4. I started peeing more blood than usual (w/kidney stent in for 2 months now) a day b4 my last blood work. Doctors are saying it's fine & wouldn't take my blood for a retest then check my serum lithium (per protocol). Cleveland Clinic disagrees. I had to go to my urologist & have them take blood & pee & send it back to the hospital I was at. Am I overreacting here? All the literature I read pointed to "it should be addressed". I just don't want any more damage done to my body than has to happen. Please help me diagnose this. It's taking me forever deciphering these blood work sheets.