I had a similar thing, I think (looking back, that is - I don't think I could have articulated it as well as you have here while in the middle of it!) where I eventually came to understand that anger was a vital bridge state of vibration that you couldn't just skip, but I had been so effectively trained to not allow myself to feel anger, that even approaching it from a distance caused panic.

With a lot of Abraham stuff, I have been finding that I tend to approach it as "they seem to be saying that this should be instant and obvious, so if it's not instant and obvious, I must be doing it wrong." BUT, slowly, as I stabilize at a higher vibration, I'm coming to see that (in my own experience at least) it's much more gradual. Much, much more gradual. So I would say that rather than having a single incident of like "Okay, now I am able to be angry!" my timeline was more like:

1) After a number of years of studying Abraham-Hicks materials, finally realize that I lie to myself all the time about how I actually feel about things. Start doing this meditation: The Most Effective Meditation Ever, which is basically about sitting and experiencing the bodily sensation of your own emotions. It's very simple and I rapidly diverged from that method, but my goodness, the first time I actually sat and allowed my body emotions to come up, I thought I was going to die. I knew, intellectually, that I was not going to die... but I still thought, you know, maybe I was going to be the exception. It was a pretty incredible experience that, in retrospect, makes clear to me how profoundly I had been trained to suppress my own emotions, as though I had grown thick scar tissue over sensitive skin in a last ditch effort at self-protection. So. I did this type of meditation for a while, then was able to take that idea of actually feeling my feelings into the rest of my life.

2) About a year later (I am, apparently, a really slow LOA study) it came to me that I could set the intention to be willing to experience anger. So I did. It would come to me in bits and pieces. It was really scary! I remember feeling intense terror at going into another room and, silently, fully experiencing extremely minor irritation with my partner. (Seriously, I had been trained by life to be a nutcase with emotional stuff.) But as I let myself experience tiny irritations, I experienced slightly bigger ones. I see, looking back, that anger and my fear of anger is all very tied up in a big life theme for me (and many people): caring what other people think. Eventually I manifested a thing in traffic that was PERFECT. There I was, in a stressful traffic situation, trying desperately to accommodate everyone around me (=trying to control how others felt, and so behaved toward me, with my own action), when a rude dude started honking and yelling at me for not being able to magically phase-shift through the construction in front of me. And suddenly all of my anger rushed in, and I didn't suppress it. I honked back. I yelled at him. I told him exactly how I felt about his entitled attitude. I have never lost my temper like that. (The guy looked pretty taken aback.) But the interesting thing for me was: I felt powerless. I got angry. And I did not then go into feeling guilty and bad for getting angry. I felt clean and pure and powerful. I felt like I had just taken a huge hit of pure oxygen or something. And as soon as I drove away, I was done.

And since then, I've felt different about anger. So in retrospect I can see, you know, I had so much terror and resistance about anger that I just wasn't able to do it all at once, even once I was open to feeling it, it was lots of tiny things until I was ready for something more intense. Not sure if that is helpful for you, but I have found that when I'm "stuck" in a place, it's sometimes because I'm trying to make a jump that's just too big to be comfortable for me at that time, but being open to a more gradual emotional process makes it move.