Yeah, under emotional duress, I become more rigid when things I counted on get changed. I have little flare-ups (either internally, or in a restrained way externally with a lot of grumbling that is emotionally charged) over things that normally I could get over right away or in about 10 minutes. It's like I need to know that I can count on certain things not to change and when they do, I get uncharacteristically upset over it.
I also tend to get that way when small incidents start forming a negative pattern. I realize that those small issues actually have more underlying meaning, but I'm not sure at which point to be sure that I'm not seeing it unfairly, or which small issue to make a big deal over, so I just get more easily annoyed/hurt/irritated/sad until it comes to a head. I don't like being that way, and ironically the reason I don't bring it up right away is that verbalizing it somehow means that I am committing to an interpretation of events that may be unreasonable or incorrect. I also am reluctant to verbalize something when I haven't figured out a course of action to deal with it, or haven't determined what response I might expect if I do say something. This is dicey though, because sometimes I underestimate the depth of emotion I'm feeling and it spills out in an embarrassing way at an inopportune time, making me seem exactly what I am trying to avoid - emotional and unreasonable. There is almost nothing worse for me than ending up crying in front of someone over an issue like that and feeling that I made a mess of making my case and also behaved in an embarrassing way besides. I feel like I have lost credibility and I usually apologize too quickly, making the other person believe that I'm just manipulating their emotions or that it wasn't that big of a deal anyway, which it really was.