I am so sorry I missed this thread (how I don't know
). I agree with every bit of advice you've gotten from KTLynn. I'd not wait re starting sub-q's (Patrick has been on them for almost 3 years now), and Pepcid Ac or Zantac are two meds frequently mentioned on the CRF list, used to combat the nausea that is so common with crf.
Fwiw, it's not unusual to see other list members mention uti's requiring at least a month of meds to clear up - did your vet get a urine sample to test? I know you said what the wbc count, but I missed if you mentioned a ua and c/s was done.
That was good news re the decrease in creatinine and the weight gain