Hello girls. I'm 6 weeks pregnant. My constant weight is 47-49kg. Now …

Hello girls. I'm 6 weeks pregnant. My constant weight is 47-49kg. Now I'm 47 and I seem to be losing weight. Doctors said very little, you need to eat meat (but it just won't come out) Girls, who had this with weight, tell me how you gained weight? Is it normal and should I worry or will I start gaining later? So I'm eating everything.