Losing Weight

Ol

Hello, I'm currently 15 weeks pregnant and have gained almost 6 kg since. I was talking to a midwife the other day and she told me that I shouldn't be gaining this much weight. I'm really worried as I don't wanna have any more complications in my pregnancy. I am also not allowed to exercise as my doctor considers me high risk as my placenta is laying low. Please help a first time mumma out!