Loud sounds

I have this thing about loud sounds and noises. I get very scared. 
If I'm given sufficient warning, I can steel myself and I'll be fine. 

I'm not sure how this all started but the earliest incident I know was when I was 8 and at an annual Xmas party at my Uncle's place. I was told I ran out of the house flustered and in tears when they started blasting Xmas carols loudly. I only vaguely remember being in great fear, feeling lost and afraid even though all my relatives were around, and that I couldn't handle it. 

I can handle balloons and/or audio sets. But there are times when my defenses are "weaker" and I get triggered by them. A single balloon near me is enough for the fear to well up deep within me and I need to escape somewhere to do deep breathing to calm myself down. 

The aircon guys are here today to install a new system for the bedrooms, and change the old piping. 

I didn't expect the work to be that loud. The initial drill caught me by surprise. It was the type of drilling where you can feel the vibrations course through your body. I was stuck in the living room with nowhere to go. Could only plug my ears with my earphones. No music was playing though. 

I've managed to tune some of the noise out. I hope to be able to concentrate on my work soon.
Today's an assigned day for policy work....