Becky,
Switching pediatricians is always a difficult choice. It sounds as though you and your baby are seeing the NP not the MD, sometimes this can be frustating if it should happen repeatedly.
I am a pediatric nurse. Before a vaccination/immunization is to be given, the NP or Pediatrician (especially if your unsure) should (and by Law) make available to you what's called a VIS "Vaccine Information Sheet", these are information sheets generated from the CDC (Center for Disease Control. Sometimes vaccines/immunizations that are not given in a timely manner, may cause loss of effitiveness. You can access these 'VIS' sheets directly through the 'CDC' website.
As far as rudeness, well unfortunately there are alot of rude people out there, not just in Pediatricians' offices. If you are happy with your Pediatrician or NP, if they care for your baby in a competent manner, and you feel secure in their care for your baby. Stick with him/her. Staff changes usually more often than not. Who knows? Maybe, the staff member you least like transfers to another Pediatricians' office the one you just happened to change to!
Good Luck in your search!
Liz in Coachella Valley