@nikita22 - Just weighed myself for the first time since the booking appointment. I'm 22 weeks and I've gained 3kg since then, probably 4kg since the beginning of pregnancy.
I think 7kgs is fine. A lot of the weight is important stuff - the baby(!), the placenta, our breasts getting ready to make milk, our bodies storing energy for breastfeeding. It's normal.
I don't like it that I'm heavier than I was and going to get bigger. But gaining weight in pregnancy is healthy and my body still feels healthy and strong.