How can i shoot a basketball when im under pressure?

Ok so I go to a gym to play and practice basketball. My 3 point shot is pretty good and so is my mid range shot. So i play pick-up games but the guys are like 15-16 and im 14. I dont really get to play with any kids my age a lot. So anyway, when I get the ball, I kinda get scared to shoot because i dont wanna dissapoint my teammates because they'll get mad. So when i finally decided to calm down and take a shot, the guys on the opposing team yell and go like "AHHH" to distract me and it really ticks me off because i miss the shot, and then my teammates get mad and tell me I have no jumpshot, and then i dont get to redeem myself because they dont pass to me anymore. It makes me wanna tell the guys to stop yelling when I shoot but I know that they'll just make fun of me. Do you have any tips that could help me shoot a basketball under any pressure? Should I go to a basketball camp and learn? I live in philly. Please any tips!?