Cramps 4 wks scared :(

Hi girls ! I'm currently 4 weeks pregnant ! Just had my first doctors appointment yesterday my due day is feb 5th !!!! I am so excited but at the same time deathly afraid bc I miscarried with my first pregnancy 4 months ago... I'm having these period like cramps that seem to subside when I drink a lot of water I'm scared but te doctor says that's normal . Are any of u girls having these too ?!??