Well they acted upon it. Thank goodness because I thought I was going to crack up if the situation continued. Yeah, it crossed the breaking point. My actions could have been a lot worse. I just wish I had been able to speak up earlier. My actions though resulted in some improvements in the entire department at work for which, while expressing concern of my stressed out behaviour, my coworkers are also expressing thanks. It took a melt down unfortunately to draw attention to how wrong things were. It shouldn't have had to happen. But regardless of how it came about, I caused positive change. Work is a little easier to go into now.
But a lesson learned - don't let it get to the breaking point in the first place. I just hope I can manage this in the future. Learn to speak up before the situation gets out of hand.