Dealing with a Kidney Infection: Need Advice

Hi, I’ve just been diagnosed with a kidney infection after battling tooth and nail with the er doctors on two separate days that my pain was not muscular (I have bronchitis on top of this so I’ve been coughing a lot) but deeper / more internal. I was discharged with antibiotics and told to come back if I have a fever or if things don’t start to get better. I do not want to go back to er as I do not feel it is to that point but I’m experiencing some new symptoms I don’t know if are connected or separate. On top of frequent urgent urination I am constipated which was not the case a couple days ago. My pain is more localized now which to me is better than the practically all over agony from before. I’ve just never had / treated a kidney infection and I’m scared of it getting worse / not catching it getting worse. Any and all help / tips / stories of experience would help… I’m sorry and thank you in advance