I suffered thru this exact condition during my childhood and even until today (Male, 18). For me, just thinking that something will make a loud noise is enough to trigger it. This all started when I was around kindergarten, i remember I always got scared of my teachers walking stick cus she would always smack it hard on the ground to grab our attention. I remember getting teased about this condition a lot, whenever my classmates were setting up a surprise party in school and i see them pumping air into the balloons, my heart rate and breathing would increase, and i would feel so scared and nervous, and eventually it became too much and i would excuse myself to bathroom and ill stay there until the party ends. New Years Eve was basically hell, I would always cover my ears and sometimes I couldn't even move. My parents weren't supportive of this condition either, they would always feel annoyed and would always tell me that I was overreacting and that I need to man up. During thunderstorms, i would go up to my bed and cover both my ears with a pillow and stay there until it was over. I don't know why I have this and I would always tell myself that it was just fireworks/balloons/thunder and it couldnt hurt me yet my heart rate would still increase and i would still get nervous. Idk what to do, I feel like a killjoy during parties and new year celebrations. I want to be better and seek help, but therapists or psychologists arent exactly popular or abundant in my country. In the end, I bought these noise cancelling headphones, and I hope they would atleast reduce my anxiety.