How have I not joined this thread before?
I really struggle with yelling, and my biggest trigger is noise. So for example tonight I'm busy cooking dinner for the kids, I feel perfectly calm but the kids are underfoot in the kitchen and they're fighting and screaming and yelling at each other - and I bottle up my frustration with it and then BAM! I explode at them.
I need to get better at identifying that the noise level is bothering me, and redirect them or get help from dh or whatever BEFORE it overwhelms me. I almost never yell except when there is a lot of noise, but with a 2yo and a 5yo there is often a lot of noise.