My 6 month old was terrified at the doctor

Michelle • Baby 💗 born 6/11/17 & 💗 born 8/27/19

We just got done with my little ones 6 month check.. she is a very happy baby. As soon as the assistant walked in she changed. She started hysterically crying and it took awhile to settle her down. My first baby never even came close to doing this. Is this behavior normal??? The anxiety in me is at an all time high worrying if my baby has something wrong with her. 😩😩