‼️‼️‼️FORMULA ‼️‼️‼️

Omg I don't know what to do!!!!!!!!!!!!
My baby just turned 4 months today and is formula fed (gentlelease)and haven't had any problems with him 💩💩until know but it's been since Wednesday he haven't done poop .today at 1pm changed diaper n when I wiped his behind seem he wanted to poop but he couldn't then seen did a lil but hard stool so any advice he isn't really eating I make him four oz and just takes 3 or 2 1/2 oz I'm so nervous and scared something is wrong with my baby.i called his dr n they said it's normal for babies to get constipated,if we feel like shit when we are I know they feel worse😔since they can't tell us .idk if to change his formula or what??the WIC lady said to maybe put less powder on his water bottle..any one had their babies constipated.?? Please need you help😔😔😔..