how do i stop feeling the blockage on my throat when i speak

how do i stop feeling the blockage on my throat when i speak i’m a 16 yo F and I’ve always thrive to do my best in everything. i feel like my dreams have been shattered because of the way i speak; it’s something that everyone else around me can perform so well but i can’t. whenever i stutter, i feel the block in my throat and it’s just so hard for me to spit the word out. i was at my internship and a patient asked me “what are your hobbies” and i said “i play t……” my nurses look at me like i’m nervous and i tried so hard to spit the word “tennis” out but it took forever. there was one point that i paused and said “sorry i have a stutter.” i felt so embarrassed after and felt like i’m not good enough to pursue my dreams. idk how to improve the way i speak, the feeling of the blockage always hunt me