Part of it is being 3 yrs old and being scared of stuff she doesn't understand, but she is SO sensitive to noises, especially cars while running when she isn't in them.
Tonight we went out to a outdoor hotdog stand for dinner and then out for ice cream outdoors a few doors down. Both were right off of a main road. The poor kid was totally overwhelmed by the sound of so much traffic and was a jittery mess most of the time.
I assume it has something to do with her mom using drugs while pregnant with her, BUT that may not be the case at all.
She did fine besides being so overwhelmed. I love seeing her doing a tiny bit better each day.