Didn't think I had anything to offer when reading this thread, but by the time I read your last post I realized your arm is likely an outward manifestation of your inner state of being and probably not a body memory from the past. Not sure if you realize you used the word "stuck" many times? I have an image of you feeling conflicted about where you want to be. I sense it's time to move forward with a major change in thinking or approach, yet you're holding back for some reason and resisting the flow of life that is trying to take you to your next destination. The force of the forward pull is overcoming your resistance so you're strengthening your fight against it (throwing egg cartons), silencing/ numbing (ice water), and using force to hold it back (compression).
This gives the sensation of being "stuck" but it's more the result of opposing energy forces than a freeze response. You may be releasing more of the past than you feel ready to, so you're constricting to stop or slow it down. Can you accept whatever is happening in your life and body at this moment, now, today without worrying about tomorrow or what comes next? Perhaps it's time to let your body guide you and maybe your arm is trying to point the way?
This gives the sensation of being "stuck" but it's more the result of opposing energy forces than a freeze response. You may be releasing more of the past than you feel ready to, so you're constricting to stop or slow it down. Can you accept whatever is happening in your life and body at this moment, now, today without worrying about tomorrow or what comes next? Perhaps it's time to let your body guide you and maybe your arm is trying to point the way?