Job Interview!!!!

I have a job interview at an md office. The only experience I have is that I have been working at an assisted living facility.....for only about 4mths. I want to work in a dr office...even thou I know it want pay what I make now. Plus its thru a temp service...I thought this would be a way to get my foot in the door...so to speak.......anyway...I am nervous about it...I mean the only things I have done..is give insulin shots...im shot (once) and did vitals...answer phone...give meds..etc....anyways...I know an office will be different...I just unsure about other things...like when someone brings baby in for a check up...??? shots??? I have never given a baby a shot??? etc...This job would be on Tues and Thurs 8-5pm. only until November...then after that...??? Anyways...can anybody who works in a doctors office give me some tips..for the interview???? THANKS!!