Girls, I'm 21 weeks pregnant. At the beginning of pregnancy, my weight…

Girls, I'm 21 weeks pregnant. At the beginning of pregnancy, my weight didn't gain much, but since 18 weeks, it started gaining actively. Since the beginning of pregnancy until today, I gained 4 kg. I was 84 kg before and now I am 88 kg. Is that too much? Do I need to reduce food intake to avoid rapid weight gain? How about you with weight increase? Recently, I have been feeling edema in my hands. From today, I will drink plenty of water. Something is becoming scary.