I've been struggling with mild anxiety for some long time but when I look back at how I was, I can say that I've come a long way in dealing with it in the past 2 years.

My anxiety is still here, almost as bad as it has always been, but most of the time I can mentally push through or close my mind for a short period of time (although in this case, the awkwardness and "cringe" will hit back later in the day). 

What I'm trying to fix right now is the fact that, while I can "mentally push through" and fake some degree of confidence, I can't control how my body reacts. 

When I'm anxious, I'm very jittery. For example: 

* If I'm holding something in my hand I will surely drop it sooner or later. 
* If I'm trying to do something with my hands that requires some small degree of accuracy (e.g. fitting a key into a key hole) I will struggle. 
* Lately I've developed a hand tremor and it also gets way worse when I'm anxious/stressed. 
* If I'm walking there's a a big possibility I will stumble a little or hit a table/bench/etc (when I forget to actively scan my surrounding so that things like this don't happen).
* I stumble my words (although I can mostly control this if I'm able to make myself slow down the rate I'm talking at).
* When I'm anticipating an event that I'm anxious about, sometimes I get chills that make me shiver, even though the room temperature is warm. This is especially odd because rarely do I feel cold, most of the time I find the temperature to be too warm.
* I've been told that my skin flushes very easily (I know my palms randomly redden sometimes but I didn't realise that my whole skin does this) .
* I find it very hard to fall asleep/stay asleep when there's the smallest hint of stress in my life (things such as simply having to go somewhere the next day even though it's not in the morning or stressful in any way will kill my sleep). This lately has forced me to get between only 3-6 hours of sleep night after night.
* I find it almost impossible to stop my mind and concentrate on how to do something (e.g. fit a car fuel cap back on when I've never done that before) and it feels like I am just driven by instinct in such situations (and I always hope it's good enough but it doesn't really work out too well).
* I also find it very hard to follow instructions/remember details when I'm in this state. 

I'm not sure if it's the most precise description, but it feels like I'm very frequently in a ~~fight~~ or **flight** response, being driven by instinct and not the rational part of my mind. Do you perhaps have any tips on how to deal with this?