I'm curious. My gynecologist in high risk group has me registered. And…

I'm curious. My gynecologist in high risk group has me registered. And my pregnancy is progressing well, the tests during pregnancy have been good. I've never been hospitalized, and haven't had any complaints... The only thing is low placental attachment (but the latest ultrasound showed it increased by 2cm), and a small fetus. Is this really that bad? And besides, she doesn't like my weight, as I've gained +12kg already. There are no swelling, I hope there won't be anymore. They wrote me some confusing diagnoses in a book. Do they pay extra for high risk groups?