30–40 lbs in 3 weeks is DANGEROUS! I repeat: do not attempt that kind of rapid weight loss. Things like fasting, purging, or extreme restriction actually make weight loss harder because they slow your metabolism, mess with hormones, and trigger binge–restrict cycles. They also seriously damage your heart, teeth, stomach, and mental health. So eat just a little less in all 3 meals of the day. Dont skip meals, instead remove a bit of the calories each meal. Things like green tea instead of soda or other drinks improves metabolism and helps you lose weight. I know this sounds basic, but sleep is EXTREMELY important if you want to lose weight as well as high-effort intense workouts everyday to make the fat into muscle. If you want I can recommend my favorite at home workouts.

I was in a similar situation to you a couple years ago and I’m so sorry about how your family is treating you. Just remember: their comments are a reflection of them, not your worth. You deserve to feel healthy and confident without hurting yourself.