Weight checks and Doctor frustrations

When they calculated her weight however they said she was a few ounces less than what they expected her to be and I feel like the went off the deep end. They are making her come back in for a weight check and told me to pump and feed after she eats or supplement with formula. Now I am ALL for making sure she Is growing properly, I am just frustrated they seem to go to fast to giving her formula... They made me feel like my supply is going and I need to build it back up by pumping more when I don't feel like I have had any supply issues.... 

Any similar stories or words of encouragement?! The other nurse there was like she is fine! If anyone looked at her they would see she is perfect! So just a frustrated mama looking for some help!