How can I control anger problems?

I have been having bouts of anger that stir up over anxiety laden issues. I have been under a tremendous amount of stress lately between work, physical ailments and my relationship. I can tend to deal with the anxiety well as of late, but I have been taking out a lot of this aggression on my wonderful girlfriend. I admit that sometimes she pushes issues, which in turn cause arguments, and I don't always think she knows exactly what it is she is apologizing for. And I admit that I sometimes feel inferior to her in regards to our professions and her successes. However, I am two years removed from a terrible relationship where I was cheated on and backstabbed from the time I was engaged until the time my ex walked out of the house, only to find out that things were going wrong after the fact, much later after she moved out from a friend. I have never had anger issues. I have never had to watch myself in fear that I might lose it and take out the agression on someone else. I am fearful that because of my terrible experiences, I have gained this subconscious resentment towards women. Is that even possible? It's almost like I am guarding myself so much that I am unable to open up and be happy all the time. I need help and advice guys. I have been on a medication for anxiety and it helps greatly. What I am looking for is some advice on how to reflect this anger elsewhere, not to my wonderful girlfriend. She deserves better, but I need help before it is too late.