This is very common problem for me... I tend to become irritable... like from small sounds and "annoying things" (usually very small things) ... I'm like too alert all the time. It goes along with anxiety and nervous/physical agitation. Guess it's just a symptom of anxiety... I'd just like to hear others' experiences with chronic irritability. I have chronic anxiety and stress out very easily "from nothing" and depression troubles and symptoms from those. Luv u all !