I'll second that. I find that the more pain I'm in, the harder it is for me to control my responses to anything - which is probably pretty normal. What's abnormal for us is how much pain we're in, and that we're in pain all the time. What I find especially frustrating about this is that it's a vicious cycle - the more pain I'm in, the more stressed I get. The more stressed I get, the more tense I am, and thus, the more pain I'm in. And for me, at least, the smallest thing can set me off.
For example, I really hate bugs. Really. But up until high school, I could handle them - I avoided them, but I could kill them if necessary. Not anymore. I'm in college in GA right now. You may not be aware of this, but in Georgia, they have cockroaches the size of mice. Well...they look that big to me, anyway.
To make a long story short, I don't normally have to deal with them. However, over the summer, I found one in my room. I was so freaked out that I couldn't bring myself to enter my room for days - I had total panic attacks. I still get jumpy at night. I'm jumpy now just thinking about it. (By the way, feel free to giggle at this a little. I occasionally laugh at my own paranoia.

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Anyway - if you find that it's really interfering with your daily function, speak to your doctor, who will probably refer you to a therapist. Since most doctors would say that RSDS patients should see therapists anyway since they deal with chronic pain, you can hit two birds with one stone.
Best to you!