Hi S.,
From what you have written, it sounds as though you and I are very similar. I am a full-time working mom, very driven in a face paced and competitive career. I have high expectations for myself and tend to place those same expectations on other people. It is unfair, but it is a habit I am in. I am working on it. :) Also, I can be pretty stubborn and opinionated. My husband is also a hard worker and driven. However, he is a little more tender hearted, is more laid back and takes things as they come. That said, he is not a great communicator, either. A lot of it has to do with him being a man.
I have found that a lot of the times, when we are fighting a lot, it is because I have placed unrealistic expectations on myself or on him or both.
We had a really rough patch for nearly a year and are working on it now. Turns out, communication was our issue as well. He would just assume I was feeling a certain way based on comments I would make that I considered to be trivial or flippant. He would then act on those assumptions, but I didn't know that. We had a big blow up and when I told him I was contemplating what was next - separation, divorce, etc., he let me know that in his mind, those weren't options because he wanted to stay together.
We have been working on communication in small steps. Also, we set aside one night a week for "date night" without our daughter. For example, if we have set aside Thursday at 7:00 and all of the sudden something blows up for me at work, I keep our date as though it were an appointment.
We use these dates to talk about our relationship, or just to have fun. Lately, they have been more fun than anything and I feel that changing my priority to him #1, then work and our daughter after that has helped.
So, I guess what I would say to you is to find what you can change in your heart and your habits as well. Ask him to communicate, but recognize that you may have made this hard for him. I would tell him that, too! If you think you have gone too far, chances are you have. You know your relationship and what's in your heart more than anyone else. It doesn't sound like the relationship is beyond repair. You need to believe that it's not about right and wrong - it's about being open and honest with each other. Tell him that as well, but unless you believe that's true, he may still have a hard time opening up to you in the future.
As far as the issue you feel you guys need to discuss, you may need to be patient before you bring that one up again. I would be surprised if he brings it up. Guys tend to think that once a conversation is over, all is resolved. I would focus on getting on track with communication first and then you will know when the time is right to revisit the issue that is gnawing at you. The key will be to not let it get to you for a little bit. Get the relationship and communication back on track first. Then, you can address bigger things. Plus, you may find that once you guys become better communicators, that the issue may not bother you as much. During the process, if you feel the urge to be angry again or blow up, I would encourage you to bite your tongue and take a break from the conversation or leave the room. Speaking from experience, this usually works better in the long run. If something is about to come out in anger, you will probably regret it later.
There are a few books out there, too. We have been reading His Needs, Her Needs. Next, I would like to try Fire Proof Your Marriage.
Best of luck!