[AnotherMarc]

First off, if the stress is truly constant, I would advise you to do at least a consultation with a mental health professional. Can't hurt, and no one here has a whole lot of context (we couldn't). My advice for a first step is to uncover why you're stressed feel rage with co-workers. Everyone has different ways of figuring that out, but it sounds like you've given it some thought, and are not sure. Hence, my suggestion.

If you have any relationship issues or anxiety about your upcoming kid (congrats by the way!), that could spill over. When my first was on her way, marriage was all good (still is), and I was excited to be a parent. But I was still nervous as hell, and I'm sure some of that nervousness spilled over to other areas.

However, it seems as if this might be a pattern for you, and so I come back to figuring out why. If you don't figure it out, any change you make is likely to result in the same feelings shortly after you make a change. I put myself through some self directed exercises in a book called What Color Is Your Parachute. It's geared to job seekers, but the first steps in the process are about self discovery. There are probably better tools, but that book was the one I grabbed for whatever reason one day in the bookstore. But anything that gets you thinking about what matters to you will help.

Good luck!