Anger Issues?

All of you who know me well know that I'm not a very confrontational or angry person. I usually just try to let things roll off my back. Don't get me wrong, there are plenty of things that annoy me and sometimes I have to vent but I rarely yell, get cranky, or hold grudges. You wouldn't think this about me though if you could see into my dreams recently.
For about the past two weeks I have been having very angry dreams pretty consistently. The first one was just random, me getting mad and yelling at a grocery store clerk. But now they are starting to involve my friends and it's kind of strange. For the most part I'm not mad (in real life) at the people in my dreams so it really makes no sense that I would be so mad. But dreams don't make sense.
Now I'm just concerned that I'm supressing things that I should be dealing with in my real life and therefore they are manifesting themselves in my dreams, very Freudian I know but it's possible. So I guess I'm asking if I'm abnormal or if this is a common occurance for other people too? Do you have angry dreams? :) Maybe I'm just a little bit paranoid but it's an interesting subject all the same.