i need advice

okay so this weird boy at my school kept bugging me for nudes so i sent him a bra pic, and he told everyone . my friends will not talk to me and i don't think i can handle everyone at school on monday bothering me about it. i feel like i should deny that i did it, and the boy that i sent them too agreed to say that he lied , but idk i just need advice ... my mother is taking me to the doctor today because she thinks i'm depressed and i'm starting to feel depressed. i can't tell her what's happening tho. pls help me . ;(