Why are you hiding it from your sister ? Your family is the first people who will understand and accept this. Trust them. It’s easier when people around you know what you are struggling with. Trust me, it becomes easier. Regarding your mom, she’s just concerned for you. She wouldn’t have used the boss card. But hey, being parents is equally harder as being a teenager. It’s okey. It’s not that bad. Trust your family and try to understand that they are trying to help you. Even now when I look back, the only people I see who really stood by me was my family.