weight gained

hai mommies ! how are you everyone ! jz wanna ask..actually I'm 24 weeks now ! my weight gained to 4kg in one month ! supposed to be 2kg only ! now doc ask me to monitor my urine test and blood pressure in every 2days once ! anyone knows what's wrong actually ? but in one month I tooks heavy foods also ! or I have to consider about my food ?? any advice ? Thank you much momies !!