Toddler's crying is driving me crazy

I don't know what it is, but the sound of my toddler's cry drives me insane. I feel an instant cortisol spike when I hear it and it makes nights where he doesn't go to sleep unbearable.It never happened with my eldest and he used to have huge tantrums. Yet as soon as I hear the youngest cry, I can't stand it. I can track the number of times he cries throughout the day by the heart rate spikes on my fitness tracker.I always encourage calmness in my kids and when they're upset, they're always helped in calming down and sometimes then expressing themselves with words. I try to stay as calm as possible because I believe it has a huge impact on them.Even his brother (who is only a year older) hates when he cries. He covers his ears, asks me to make it stop and even tries hard to console him. He cries more when his brother or I am around yet can happily play by himself for extended times.I'm so ashamed to admit but there have been times where I've snapped and yelled at him for crying (mainly in the evening when he should have been asleep hrs ago but is still carrying on). It's like my own version of a toddler tantrum and I'm so disappointed to lose my calm but it drives me mad everytime I hear it.Does anyone have any tips or suggestions on how to deal with it? via /r/Parenting https://ift.tt/2EwOTqp