Hi Ousaima,
there are lots of informations in your post, some of which relate to the brain stem and others not. So, let's put anxiety, panic attacks and vertigo as well as depression and anger aside, for they seem related to cerebral cortex issues which we'll cover later.
The dorsal vagal response, which is active in the brain stem constellation, is somewhat like "feigning dead": one doesn't move, the heart rate and life functions are down, and one can't think straight. 
When we're angry, usually the heart rate and blood pressure is quite high, that's the sympathetic nerves making us ready to fight.
So what I read is that you definitely activated the kidney tubules and they exacerbate the pain and decrease orientation. 

The relationship with your physiotherapist seems a tricky one, first you found it hard to trust him which means that you stayed somewhat defensive (and the tubules weren't released). Then he succeeded in relaxing your muscles, and does so repeatedly, but the success doesn't last. So there is a resolution (shown by frequent urination) but as it also comes with pain, it pulls your muscles back into tightness, right?
So he may be right that it's your long-imprinted thoughts and beliefs that are at play, or it's simply the sensation of pain that's the stress trigger (of self-devaluation?). 

Regarding the freezing, this seems like healing peaks of the KCT to me. And they came repeatedly because you were back in a stress response in the meantime.
The musculoskeletal system isn't easy to work with, pain can come on both phases, therefore we need motivation by something we believe in to get us through the rough! 
So you may reflect what is happening when your muscles relax? Is relaxation possible without making you freeze? Are your conditions at home safe for relaxing?