Hi Coronavirus
I would suggest that there are a number of issues here:
1. The size of the adrenal dump
2. Your reaction to the adrenal dump.
We all get adrenaline dumps. These vary in intensity according to the perception of the stimuli. Now an adrenaline dump is an unconscious act that can be triggered in a number of different ways. It can be caused by the cerebrum thinking about or perceiving danger, triggering a reaction in the amygdala which then triggers the adrenal glands. It can also be caused by the amygdala without anything coming from the cerebrum because there are direct links between the optical nerves and the amygdala.
What you have described is both normal and abnormal. It's abnormal because it is a severity of reaction almost unknown in training situations. It is normal in that it is a common reaction to a real life fight/freeze/flight 'lethal threat' level adrenal response.
So the issue seems to be relatively simple: you are dumping too much adrenaline.
Now ultimately the cause of this could just be a lack of familiarity with the situation and a consequently heightened response. Alternatively the situation may be triggering a memory of an incident in your past where you've been hurt thus provoking the adrenal response.
Suggested Solution:
You need more of this training. This will achieve two things. Firstly it will aclimatise you to working with adrenaline. Secondly it will stress inoculate you and result in a lower adrenal release with the same stimuli, allowing you more control. While this is taking place you may require more supervision for safety reasons.
More low level training may well increase your control and your ability to spot the telegraphs of techniques, which will make you feel less pressurised, so will be of benefit, however it will not desensitise you to the stress of more pressurised attacks - which is probably what you need.