I CANT GAIN ANY WEIGHT😢

hey ladies, i’ve been small my whole life. my family name is skinny minnie. however at i’m the point in my life where i don’t wanna be skinny minnie anymore i want a little weight on me. i currently 110 (i’m 18 years old) this is a little small for my age so my doctor put me on birth control help with my hormones and see if that helps me gain weight but it hasn’t. I tried going to the gym and working out. I also tried doubling my food intake. i even became depressed and start trying supplements but i stopped because i began to do my research on them. i know a lot of people are like i would love t be your size but it’s not fun when every time someone sees you they ask if you eat or why are you so small. none of these things worked can anyone give me tips on what to do!! i wanna at least get to 120-125