The link between emotions and blood pressure as well as thermoregulation you describe sounds a lot like vasovagal response

I think the fact that vasovagal responses exist illustrate one well documented instance where there's interplay between those forces.

In that case I doubt that is what I'm experiencing, since I haven't noticed ANY correlation between my day-to-day emotional state, and how hot or cold I'm feeling.

I speak about repressing certain things for longer periods of time. Not something where you repress your trauma one day and don't do it the next. You can do the change in a single day. Even in a minute but that's not what happens most of the time.