your husband has probably developed end stage kidney
disease due to goodpastures syndrome.
For the symptoms you mentioned you need to get some tests done like urea,creat, electrolytes, calcium level.
need to look if he is receiving adequate dialysis?. If on peritoneal dialysis
do Cell count of PD fluid and Culture to look if he has developed peritonitis
These symptoms may be due to electrolyte imbalance
or inadequate dialysis or occult infections.
you need to consult your Doc.