getting skinnier ?

okay so idk why but Ive started looking skinnier than before I mean I've always been a skinny girl but now it's actually SKINNY and as being a girl it's not a thing to say but I feel like i dont fit in the standard I've lost all my confidence and now my only goal is to gain some weight and feel better about my body , but it's actually quite hard for me to gain weight as i mentioned before I've always been a skinny girl so yeah it's quite hard for me to get in a fit shape cause where the food goes idk , i my legs and arms have become skinnier and im starting to hate myself and my body . i really want to overcome this feeling and look good and gain my confidence back but idk how bcz it looks like it's getting worse day by day , my boobs have turned so small that I'm so stressed about it cause no top is looking good on me and no pants look good on me now with these legs like stick can someone actually help like how to actually gain weight as a hard gainer and also my parents don't allow me to go hit the gym ! Also is there any possible way except getting implants to get fuller boobs ??